Answer:
Hi there!
the correct answer to this question is: Hemoglobin
Explanation:
Iron is needed by the body to make hemoglobin.
Answer:
Iron is needed by the body for optimal functions.
Explanation:
Iron has various functions in the body. A well known function is its presence in the muscle as haemoglobin which helps transport blood. It is also present in the muscle (myoglobin); and in molecules (cytochromes)
In pea plants, purple flowers are dominant over white flowers, which are recessive. Cross two homozygous dominant (PP) parents.
Final answer:
Crossing two homozygous dominant pea plants (PP) will result in 100% homozygous dominant offspring (PP) with purple flowers.
Explanation:
When two homozygous dominant (PP) pea plants with purple flowers are crossed, all of the offspring will also have purple flowers. This is because purple flowers are dominant over white flowers. As these pea plants are homozygous dominant, each parent will contribute a dominant P allele to their offspring, resulting in offspring with a PP genotype. Therefore, a Punnett square analysis for this cross is not required as the outcome will be 100% PP offspring with purple flowers.
Explain how gases in the
atmosphere can cause the
greenhouse effect and describe
one problem which it may cause
PLEASE HELP ME
Gases in the atmosphere, ie., carbon dioxide, nitrous oxide, and methane, trap the heat from water vapor the sun has evaporated. This can cause higher temperatures, and forms the greenhouse effect. A problem it causes is global warming, since those gasses are trapping the heat in the atmosphere, harming the ozone layer, causing more ultraviolet rays to go through, which is very harmful to humans.
Hope I helped :)
Explanation:
The greenhouse effect is a process that occurs when gases in Earth's atmosphere trap the Sun's heat. This process makes Earth much warmer than it would be without an atmosphere.This cause global warming
Currents that occur in Deep water are
Wind driven
Continental
Corliois waves
Thermohaline
Answer:
Thermohaline
Explanation:
Ocean currents are very deep and can go many thousand meters under the water. These currents influence the water density. This fenomenon s known as thermohaline circulation.
Thermohaline circulation serves to mix and transport the water in the ocean.These circulation is caused by sinking surface water.
Answer:
Currents that occur in Deep water are:
Thermohaline.Explanation:
The circulation called Termohaline refers to the currents that occur in the depths of the oceans due to the difference in salinity or heat between the waters (hence its name, since thermos is the Greek root for hot), this occurs since as the temperature of a flow of water increases, its density decreases, when this occurs, this water tends to rise while the denser water drops, this cycle of events allows for marine currents.
Velocity (m/s)
5
8
9
10
11
12
6 7
Time (s)
3
) A dog was west of his home for a short time and returns home then runs past it in the other direction (east). The graph shows
his position as a function of time.
How long did the dog stop at his home before running again?
A)1 seconds
B)2 seconds
C)5 seconds
D)10 seconds
Answer:
Although the graph was missing, I managed to find it on another source. According to the given conditions, correct answer is option C. A dog stop at his home for 5 seconds.
Reason:
In the graph, The dog was west of his home then he came back, he stopped at his home then runs to other direction (East).
When the dog was running from west to home, his running speed or velocity was 1 m/s which was then decreased to 0 m/s after reaching home. Here (at home) the dog stopped for a while (5 seconds according to the graph), and his velocity was 0 m/s. Then, he started running again to other East direction with velocity -2 m/s (opposite direction).
See attached images for further description.
Through the process of simple diffusion, materials move across a cell membrane
A.
from an area of higher concentration to an area of lower concentration.
B.
from an area of lower concentration to an area of higher concentration.
C.
between areas of equal concentration.
D.
all of these
Answer:
The correct answer is A from an area of higher concentration to an area of lower concentration
Explanation:
Diffusion is one of the most important membrane transport process which helps in the transport of small molecules and gases across the plasma membrane from higher concentration region to the region of low concentration until the concentration of the transported molecule becomes equal at both sides.
As the molecule move along the concentration gradient no external energy is needed to carry out simple diffusion.
Answer:
A. from an area of higher concentration to an area of lower concentration.
Explanation:
Through the process of simple diffusion, materials move across a cell membrane from an area of higher concentration to an area of lower concentration. The direction of movement can be into or out of the cell depending on the concentration of materials on either side of the membrane.
Hope this helps
Why is it commonly believed that carbon dioxide is responsible for global warming? Select 2 options. Carbon dioxide levels in the Earth’s atmosphere have been steadily decreasing. Carbon dioxide levels in the Earth’s atmosphere have been steadily increasing. Carbon has a longer average lifetime in the atmosphere. Carbon has a shorter average lifetime in the atmosphere. Other greenhouse gases amplify the effect of carbon dioxide.
Answer:
Option B and D are correct as the Carbon dioxide levels in the Earth’s atmosphere have been steadily increasing and other greenhouse gases amplify the effect of carbon dioxide.
Explanation:
As we all are aware that increasing rate of carbon dioxide is responsible for global warming. Scientists note that the average temperature on Earth is increasing over time. They believe that a contributing factor is the greenhouse effect.
This effect is caused by the formation of greenhouse gases, such as methane, water vapor, and carbon dioxide. Increasing the amount of greenhouse gases in the atmosphere is considered to be the cause of global warming and climate change. Water vapor, carbon dioxide, methane, nitrous oxide and ozone are main green house gases.
Carbon dioxide is steadily increasing in the atmosphere over hundreds of years and it has a longer life span than most of the gases.
Option B and C
Explanation:Carbon dioxide is the most prominent greenhouse gas of atmosphere. It is very much responsible for increasing the temperature of Earth's surface by capturing the long wave infrared lights emitted by Earth's surface.
Due to industrial revolution, various natural calamities and huge increase in population over the last few centuries, amount of carbon dioxide is increasing in atmosphere significantly. And the half life of carbon dioxide in atmosphere is around 200 years which is much more than other significant greenhouse gases. This leads to the significant contribution of carbon dioxide to greenhouse effect.
Help me please and thanks
Answer:
In the process of nitrogen fixation, the decomposers convert free nitrogen into ammonia so that it can be used again by the plants in the soil. So the answer is 'A'.
Explanation:
Nitrogen fixation is the process by which nitrogen is converted into other organic forms and then broken down again to carry out the cycle again.
All the organisms use a fixed form of nitrogen to produce amino acids. The cycle helps the plants by providing them with ammonium. Nitrogen Fixation is carried out by bacteria, decomposers etc. When the nitrogen is fixed and utilized, the decomposers help in breaking down proteins in the excreta and bodies of dead organisms, converting it back into ammonia for the plants to use. In short, they carry out the recycling process.
What happens to the amount of available energy in the pyramid as it moves up through the different levels? A) It increases. B) It decreases. C) It remains the same. D) It decreases, then increases. Elimin
Answer:
The correct option is B) It decreases
Explanation:
As we move up the trophic levels in an energy pyramid, the energy which is passed from one trophic level to other decreases. Only 10% of the energy is known to pass from one trophic level to another. Most of the energy is lost as heat or used by the organism.
For example, suppose a plant has 100 calories in it. It will pass only 10 calories to the animal ( primary consumer) which eats it. The primary consumer will only pass 1% energy to the secondary consumer which eats it. Hence, we see that to the amount of available energy decreases as we move up the trophic levels.
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#30
There were no geologists alive when the Bright Angel shale layer formed. However, scientists have been able to determine that this rock formed near the shore of an ocean. What evidence could geologists use today to find out about this ancient rock layer?
Answer:
because people where not alive yet oontill cenoznic era
Explanation:
Answer: Scientists could examine rock that formed recently and compare it to Bright Angel Shale. If the recent rock forms near oceans, the Bright Angel Shale rocks may have too.
what's the purpose of a punnet square
Answer:
Punnet square helps in predicting genetic outcome of a cross. or Finding the phenotype ration for a cross
its based on the question u got on apex .
Explanation:
The diagram is used by biologists to determine the probability of an offspring having a particular genotype. The Punnet square is a tabular summary of possible combinations of maternal alleles with paternal alleles. ... The Punnet square is a visual representation of Mendelian inheritance.
Answer:
a punnett square shows the probability that the parents off spring will have a certain phenotype be cross the parents two genotypes
further Explanation:
so a punnett square take two parents and crosses them to calculate the chance you will get a certain phenotype by drawing a square and splitting it into four quarter you take the dads two genotypes and put them on the top of the square and you put the moms on the side now that you have the parents genotypes labeled you cross them the letters are there alleles so if you have a upper case allele then it is dominant meaning the offspring get the dominant trait (phenotype) now if you have two lower case letters then the offspring get the non-dominant trait (phenotype) so Bb is gets a dominant trait BB is a dominant trait but bb is a non dominant trait the way you cross them is say you have BBxbb here's what the chart will look like
B B
b Bb Bb
b Bb Bb
i hoped this helped if it di please give me brainlest
Refer the the graph below showing the absorption spectrum of chlorophyll a. Explain what the graph is showing
Answer: The graph shows that chlorophyll a absorbs light principally around 420-450 nm and 650-680nm wavelengths
Explanation: Chlorophyll a is a pigment found in plants that traps light energy for use in photosynthesis. Chlorophyll a absorbs light mostly in the blue and orange-red wavelengths. This is shown in the graph, where the peaks are around the 400nm and 600nm wavelengths, corresponding to blue and red in visible light.
This absorption means the pigment is 'excited' by this light, sending into a higher state if energy which provides energy for the reactions of photosynthesis.
Which molecule activates light reactions? ATP, chlorophyll, water, NADPH
Answer:
chlorophyll
Explanation:
Which is a better conductor of heat: air or a copper wire? Why?
A) Air is a better conductor of heat because it is a mixture.
B) Copper is a better conductor of heat because it contains electrons.
C) Air conducts heat better because the molecules in a gas are further apart.
D) Copper wire conducts heat better because molecules in a solid are closer together.
Answer:
i think the answer is D
Explanation:
A better conductor of heat is copper wire, which conducts heat better because molecules in a solid are closer together, which is option D. Copper is a good conductor of heat because it has free electrons that can move throughout the metal and transfer thermal energy quickly.
What is copper?Copper is a better conductor of heat than air because of the way its atoms and molecules are arranged. In a solid like copper, the atoms are packed closely together, allowing heat energy to be transferred quickly through the material. In contrast, in a gas like air, the molecules are much further apart, and heat energy transfers more slowly as a result. This is why copper is often used in electrical wiring and in other applications where high conductivity is needed.
Hence, a better conductor of heat is copper wire, which conducts heat better because molecules in a solid are closer together, which is option D.
Learn more about copper here.
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Compare the composition of the Inhaled and exhaled air ?
Where do clouds form? Select three options.
A. at the ground
B. in the upper atmosphere
C. near the Earth’s surface
D. where the air has very low humidity
E. where the atmosphere contains few particles
B
By the upper atmosphere, it is meant the upper atmosphere of the troposphere – the lowest layer of the earth’s atmosphere where weather events occur.
Explanation:
Liquid water first evaporates from the earth’s surface, mostly due to heat energy from the sun. The water vapor cools as it rises into the upper troposphere. This is because the upper atmosphere is cooler. As the water vapor cools, it coalesces into water droplets. These droplets, for them to form a cloud, need seed-like particles – like dust suspended in the atmosphere– to coalescence on. This way, the droplets grow bigger and this is how clouds are formed.
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Answer:
B DE
Explanation:
Describe the first interaction that triggers signaling to begin in a target cell
Answer:
Explanation :At first, the activated receptor relates with G proteins molecules in the cell.
before the ultimate physiological effect of the ligand on the cell's behavior is produced Therefore, the cellular signaling starts as soon as the first messenger (the ligand) binds to its receptor.
Cell signaling is the fundamental process in which a piece of certain information is transferred from the cell surface to the cell's nucleus. The first process in the triggering of the target cell is its ability to bind to the specific ligand.
Cells communicate through chemical signals. These signals are generally proteins or other molecules produced by the sending cells. The molecule is then released in the extracellular matrix, where they float until reaching the target cell.
The target cell must possess a receptor to bind with the incoming signal molecule. The binding of receptors and signaling molecules alters the shape and initiates the series of chemical reactions in the cell. The ligands are usually the signaling molecules, which bind to specific receptors.
Therefore, the first interaction that triggers the signaling to begin target cell response is the binding of ligand to the specific receptor.
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What changes occurred in the surroundings of the species from Hyracotherium to Equus?
The changes that occurred in the surroundings of the species from Hyracotherium to Equus are young shoots of trees and shrubs to tough leaves of grasses and wooded swampy areas to plains.
Explanation:
Hyracotherium is the fossil horse which is extinct. It was small and had teeth that were adapted to browsing on young shoots of trees and shrubs. It was adapted to live in wooded swampy areas where more toes were an advantage.
Equus is the present day horse or the modern horse. It is much larger and has larger teeth that are adapted to grazing on the tough leaves of grasses. The single hoofed toes of the present day horse allow it to travel fast in the plains.
The changes that can be associated with surroundings of the species from Hyracotherium to Equus are the presence of young shoots of trees and shrubs.
What are Hyracotherium?
Hyracotherium serves as genus of lower Eocene perissodactylous mammals having the size of a fox having four-toed forelimbs.
They are among the earliest ancestors of the modern horse, however, changes occurred in the surroundings of the species from Hyracotherium to Equus is the tough leaves of grasses around it.
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Which statements describe the fossil record? Check all that apply.
There is very little fossil evidence for the first 4 billion years of Earth.
There is very little fossil evidence for the last 600 million years of Earth.
Most of the fossil evidence is from the first 4 billion years of Earth.
Most of the fossil evidence is from the last 600 million years of Earth.
The fossil record is complete.
The fossil record is not complete.
Statements that gave description as regards fossils records in the question are;
There is very little fossil evidence for the first 4 billion years of Earth.The fossil record is complete.Fossil record can be regarded as documented records which is dine through help of by fossils.
These fossils comes from the remains of organisms as well as imprints of organisms which is been preserved in sedimentary rock as far as earlier geological periods.
For the first 4 billion years of Earth, the records of Fossil evidence is very little, but as time goes on, there are alot of evidence discovered, and the totality is known as Fossil records.
This records helps to get the record of the occurrence of living organism as well as its evolution, geological time as inferred from fossils.
Some of Examples are:exoskeletonsbonesobjects preserved in amber hairshells stone imprints of animalsThe totality of fossils is known as the fossil record
Therefore, Fossil records helps in explanation of evolution of living organisms
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The correct options are (A), (D), and (F). The statements that describe the fossil record accurately are There is very little fossil evidence for the first 4 billion years of Earth, Most of the fossil evidence is from the last 600 million years of Earth and The fossil record is not complete.
Let's evaluate each statement about the fossil record:
A) There is very little fossil evidence for the first 4 billion years of Earth.
True Fossil evidence is sparse for the first 4 billion years of Earth's history, primarily because early life forms were mostly microscopic and not easily preserved. Fossils from this period are rare and mostly consist of simple organisms like bacteria.B) There is very little fossil evidence for the last 600 million years of Earth.
FalseThere is actually a considerable amount of fossil evidence for the last 600 million years, especially since this period includes the Cambrian Explosion, a time of rapid diversification of life forms, and the development of complex organisms.C) Most of the fossil evidence is from the first 4 billion years of Earth.
FalseMost of the fossil evidence comes from the last 600 million years, especially since more complex and larger organisms became prevalent and more likely to be preserved as fossils.D) Most of the fossil evidence is from the last 600 million years of Earth.
TrueMost of the fossil record, particularly detailed and diverse fossils, comes from the last 600 million years, which includes the Cambrian period to the present. This period features a wealth of preserved life forms and a greater diversity of fossils.E) The fossil record is complete.
FalseThe fossil record is not complete. Many factors, such as geological processes and the nature of fossilization, result in gaps in the record. Not all organisms are equally likely to be preserved as fossils.F) The fossil record is not complete.
TrueThe fossil record is indeed incomplete. Many organisms did not fossilize, and geological processes can destroy fossils, leaving gaps in our understanding of the history of life.The complete question is:
Which statements describe the fossil record? Check all that apply.
A) There is very little fossil evidence for the first 4 billion years of Earth.
B) There is very little fossil evidence for the last 600 million years of Earth.
C) Most of the fossil evidence is from the first 4 billion years of Earth.
D) Most of the fossil evidence is from the last 600 million years of Earth.
E) The fossil record is complete.
F) The fossil record is not complete.
PLEASE ANSWER QUICK!!! Jonas drew a diagram to compare two kinds of evidence that support the theory of evolution. Which label belongs in the area marked Z? no longer used by species link two species to a common ancestor evidence of adaptations to similar environments part of comparative anatomy studies
The label that belongs in the area marked Z indicates evidence of adaptations to similar environments. Thus, the correct option for this question is C.
What is Evolution?Evolution may be defined as a type of biological process that involves changes in the proportions of biological types in a population over a specific period of time. It involves the descent with modification from preexisting species.
The term adaptation can be defined as the evolutionary strategies through which species face different environments. Different kinds of species may have identical types of adaptations in order to face the same environmental conditions.
Therefore, the label that belongs in the area marked Z indicates evidence of adaptations to similar environments. Thus, the correct option for this question is C.
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Answer:
The correct answer is (C) evidence of adaptations to similar environments.
Science help please
Answer: It would actually be C
Explanation: the mRNA stand for Messenger RNA. It's the type of RNA that carries protein-building. Hence... its C
What might happen to an organism that uses asexual reproduction if the average temperature of its habitat changes?
A. The organisms will not grow as large as before the temperature change.
B. The organism will change to adapt to its environment.
C. The species may become extinct because it cannot adapt to change.
D. More of the organisms will survive to adulthood.
(These are multiple choice questions btw)
C
Asexual production, such as in budding, creates exact copies as the parent cell and hence there is little variability between the parent and offspring. While asexual reproduction offers the advantage of fast reproduction it also bears a great disadvantage.
Explanation:
Natural selection acts on variability to help a population adapt to change in an environment. During a change in environment, the organisms with genes better adapted to the new environment become more favorable to pass their genes. Therefore the population evolves over time to have more of these alleles in the population. A population with low variability becomes less able to adapt to changes in the environment.
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A segment of a DNA strand is GTC TAG. Which of
strand is GTC TAG. Which of the following is the complementary DNA
strand?
GTC TAG
GUC UTG
CAG AUC
CAG ATC
Answer:
CAG ATC
Explanation:
DNA is the genetic material of most living cells. A DNA molecule consists of two long polynucleotide chains composed of four types of nucleotide subunits (Adenine, Guanine, Cytosine and Thymine). Each of these chains is known as the DNA strand making the DNA molecule double-stranded. Hydrogen bonds between the bases of the nucleotide hold the two chains together.
An hydrogen bond holds two nucleotides together using the COMPLEMENTARY BASE PAIRING RULE, which states that Adenine base (A) will always hydrogen bond to Thymine base (T) while Guanine base (G) will always hydrogen bond to Cytosine base (C) in a DNA molecule. This is responsible for the double-helical structure of the DNA. Based on this principle, a DNA molecule with sequence: GTC TAG will have a complementary strand with sequence: CAG ATC.
state in sequence four main steps of sexual reproduction and write two advantages of such reproduction
Answer:
Hello!
Sexual Reproduction has slightly different stages in plants and animals. Sexual reproduction in plants has the following steps:
PollinationGamete germinationFertilizationZygote FormationSexual reproduction in animals has the following steps:
Gamete formation Fertilization Zygote formation Zygote develops into embryoAdvantages:
The embryo develops in a protective environment i.e. the ovary in plants and uterus in animals. Sexual reproduction produces genetic variations in the offspring that aid survival and incur resistance to diseases.Explanation:
* Pre-fertilization stages include meiosis 1 and 2 that involve the formation of genetically different gametes.
* The stages, zygote formation and the development of the zygote into an embryo and later into an individual, are classed as post-fertilization stages.
Is it true that all cells have the same genes, but different genes are active in different cells?
Answer:
Is it true that all cells have the same genes, but different genes are active in different cells.
No, all cells are made up of a gene which is inherited from the parents cell. The gene is located in the DNA which is found in the nucleus of every living cell
Explanation:
Unspecialized human cells are called ____________.
Question 3 options:
cancer cells.
mitotic cells.
signal cells.
stem cells.
Answer:
D. Stem Cells
Explanation:
Stem cells are cells that are able to be developed into most other types of cells in order to repair and restore damage in the body. To do this, stem cells must be able to specialize into many other different cell types. This means that first the stem cells must be an unspecialized human cell to later become specialized.
Investigator Smith is convinced that he has found a gun used in two shootings. When compared under the microscope, the two bullets do not seem to match up. If Investigator Smith is correct, what could be a reason why the bullets don't match?
The bullets hit at different speeds.
The bullets were bought from different gun stores.
The bullets were fired one right after the other.
One bullet was fired several years after the other.
Answer:
D) One bullet was fired several years after the other.
Explanation:
Every gun barrel has rotating groves because gives to the bullet a spin movement in order to improve accuracy during its flight. This spiralling groves leave in the bullet some unique marks, that if you can fire another bullet from the same gun, under a microscope an investigator can match this groves. But time and the use on the gun can change the patron of this marks leading to the deterioration on the gun barrel, possibly take us to a missmatch on two bullets fired by the same gun.
Final answer:
The bullets don't match because they were fired from different guns, which create unique markings on the bullets.
Explanation:
Investigator Smith may have incorrectly concluded that the gun he found was used in the two shootings. One possible reason why the bullets don't match is that they were fired from different guns. Each gun leaves distinct markings on a bullet when it is fired, creating unique striations. If the bullets under the microscope do not show similar markings, it suggests they were not fired from the same gun.
Therefore, the correct answer is that the bullets were fired from different guns. This could be due to different guns having different barrel characteristics, wear and tear, manufacturing defects, or modifications.
It is important for a forensic investigator to analyze various factors, such as bullet markings and gun characteristics, to determine if a bullet was fired from a specific gun.
Many wants to increase the yield of herd garden. A friend suggest that she pinch of the tops of the plants as the grow by cutting off the apical meristem how should this increase yield?
Answer: Photosynthesis takes place in the chloroplast of green plant cells
Explanation:
In which area would you have the most difficulty breathing?
Answer:
The top of the mountain
Explanation:
The air is the thinnest at high altitudes, like the top of a mountain
Answer:
The top of the mountain
Explanation:
The top of the mountain is where the air is under the least pressure and, a lesser amount of oxygen is present, along with that, because in the picture, the top of the mountain would have the least amount of air pressure, said air (specifically oxygen) will have more difficulty making it through your lung's selectively permeable membranes, and making it's way around your body in your red blood cells.
A cell that is undergoing mitosis is examined with a light microscope. An observation that would allow for identification of the cell as an animal cell rather than a plant cell would be
Question 10 options:
the centrioles migrating.
the chromosome pairs separating from each other.
the chromosomes twisting about each other.
the nucleoli disappearing.
Answer:
An observation that would allow for identification of the cell as an animal cell rather than a plant cell would be the centrioles migrating.
Explanation:
Centrioles start moving in the direction of opposite ends of the cell, whereas the microtubules starts moving from the centrioles and gets attached to the centromeres of chromosomes. the microtubules that have been projecting from the centrioles on opposite poles of the cell are connected to individual centromere and further form into spindle fibers. After the accumulation of chromatin into chromosomes in prophase, resulting in the breaking apart of the membrane or nuclear envelope. In case of animal cells, the centrioles present at the nucleus starts to separate and go to the opposite poles of the cell. As the centrioles transfer, a spindle is seen to be formed between them.