Prokaryotic and eukaryotic cells differ in various ways, including the presence of a true nucleus and membrane-bound organelles in eukaryotic cells.
Explanation:The structure of prokaryotic and eukaryotic cells differ in various ways. While both types of cells have a plasma membrane, cytoplasm, genetic material, and ribosomes, eukaryotic cells are typically larger and more complex. Eukaryotic cells have a true nucleus, membrane-bound organelles, and multiple chromosomes, whereas prokaryotic cells lack a nucleus and membrane-bound organelles and generally have a single, circular chromosome.
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I’m a population when the birth rate becomes higher than the death rate the population growth rate
Population Growth Rate Increases
Explanation
I’m a population when the birth rate becomes higher than the death rate the population growth rate also increases. It is understood that if the death rate is less which means that less number of people die and more is the birth rate. As a result, the population growth increases which may result in a shortage of food, water and many other important resources which are essential for human life. Along with this increase in population means more need for other sources as per every individual's requirement.
Uranium-235 undergoes nuclear fission as shown in the diagram below.
which element does X represent?
A) 95 Kr
36
B) 96 Kr
36
C) 97 Kr
36
D) 98 Kr
36
answer is A
youre welcome
Answer
A) 95 Kr
36
Explanation
The process by which a large nucleus split into two smaller nuclei is called nuclear fission and occurs after the nucleus has absorbed a neutron that is a product of the radioactive decay of another atom. The formed fission fragments are unstable and extremely radioactive.
What forms the backbone of DNA?
The backbone of DNA is formed by a sugar-phosphate backbone.
Explanation:The backbone of DNA is formed by a sugar-phosphate backbone.
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What is represented by a pair of lower case letters such as tt in a punnets square?
A. A heterozygous pair of genes
B. A pair of recessive genes
C. A dihybrid pair of genes
D. A pair of dominant genes
b.
IF it was two upper case like TT then itd be dominant
A pair of recessive genes is represented by a pair of lower case letters such as tt in a punnets square. The correct option is B.
Thus, In a Punnett square, two lowercase letters like "tt" often stand in for two recessive genes.
Lowercase letters in genetics often stand in for recessive alleles while uppercase letters signify dominant alleles. When two lowercase letters appear together in a Punnett square, it means that both alleles for that particular gene are recessive.
This indicates that in order for a person to have the trait linked to a recessive gene, they would need to inherit two copies of the recessive allele (one from each parent).
Thus, A pair of recessive genes is represented by a pair of lower case letters such as tt in a punnet square. The correct option is B.
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if a grape were placed in a hypertonic solution what would happen and why?
if a grape was put in hypertonic solution, water will move down the concentration gradient from high concentration (in the grape) to low concentration (the solution), causing it to shrink.
Hope ths helps
Wagner observed the coastlines and continents in the southern hemisphere has similar grooves which of the following supports coastlines far away from one another having similar Grooves
Answer
The Continental drift
Explanation
From a geographical perspective, the evidence is that Africa and South America might have been a single mass of land due to similar coastal alignment. In addition to that, there is similarity in mountain ranges of Buenos Aires in Argentina to those mountains in South Africa. These mountain ranges have same age and were formed by similar rocks.
Answer:
Glacial Movements
Explanation:
Glaciers usually move in one direction, creating large scratches in rocks around the coastline.
how do cells maintain homeostasis using active transport
Hey there!
Cells maintain homeostasis using active transport by maintaining conditions and within the normal ranges inside all of an organism's cells.
Hope this helped. Would you mind marking me brainliest. Thankyou!
Answer:
homeostasis in a cell maintained when a cell maintains stability in response to any situation
Explanation:
The _____ is usually a good choice to represent a whole data set as a single number.
A. mean
B. mode
C. range
D. median
Answer:The answer is c
Explanation: The mean is usually a good choice to represent a whole data set as a single number.
Mean is derived by adding a whole data and dividing the data by the number of points. It can also be referred to as the average that is used to derive the central tendency of data. It also measures the central tendency in a data set. It can be called an average.
Which procedure would help ensure that a foreign DNA fragment could easily incorporate into a bacterial plasmid when the two are mixed together?
a)The fragment and plasmid are both cut with the same restriction enzyme.
b)The plasmid is modified to contain GFP.
c)The plasmid is pretreated with DNA ligase.
d)The DNA fragment is pretreated with DNA ligase.
What is the haploid number of chromosomes in an organism with 46 chromosomes in the body cells?
23 haploid Chromosomes for each human
Habitat vs. Niche Group Activity
Habitat is a place in which an animals lives
A niche is the organisms place or job in the environment
Answer:
Habitat:
Habitat may be defined as the particular area occupied by the organism. Habitat involves the physical activity performed by the organism in its area. Habitat only reflects the living place of the organism. Habitat explains where the species live in the ecosystem.
Niche:
Niche may be defined as the role of the individual organism in its ecosystem. The function or the physiological activity of the organism in the area describes the niche. The association of the organism with the biotic and abiotic component to obtain food is included in niche. Niches explains the way by which organism live in an ecosystem.
What is a filter like structure that works as a sieve and captures microscopic organisms?
I think the answer is a baleen.
Select the correct answer.
You are a sales representative for a company that makes a new alternate fuel for vehicles. You have prepared a presentation for the environmental engineers to sell your new product. What question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment?
A. Do we have to change any parts of the vehicle to use this alternate fuel?
B. Will the vehicles get better fuel mileage with the alternate fuel?
C. How much greenhouse gas does your fuel produce compared with current fuel sources?
D. Is the alternate fuel more expensive than fossil fuel?
i think its D or B just take a 50/50 guess i think its D
Neurons are classified into three types according to the ______________
______ the impulse travels.
Name the three types of neurons classified according to the direction in which the impulse is being transmitted. Define or explain each of them. Sensory neurons, also called afferent neurons, transmit impulses to the spinal cord and brain from all areas of the body.
Analisa conducted an experiment to determine if watching different types of commercials would affect a person's pulse. Her hypothesis was that pulse rate would change with different types of commercials. Each person watched seven different commercials, averaging 30 seconds each. Each person's pulse was taken before the commercial and then after each commercial. Based on her experiment Analisa concluded that a person's pulse rate changed when the person watched different types of commercials. Which component is missing from Analisa's experiment? A. a question B. a hypothesis C. a control group D. a description of the experiment
im pretty sure the answer would be C, control group. not 100% sure
Answer: C. a control group
Explanation:
A control group is the group which is used in an experiment. It is kept as a standard or benchmark for the comparison of the changes that occur in an experimental variables.
In the given experiment no control group is used. That is all the seven groups were exposed to different types of commercial there was no group which was not exposed any of the commercial. Hence, the validity of the experiment is doubtful.
If a corn cell had 18 chromosomes would it be a gamete or somatic?
A corn cell with 18 chromosomes would not typical for gametes or somatic cells as the gamete would have 10 chromosomes, and somatic cells would have 20. The condition might be due to chromosomal abnormalities or polyploidy. Mitosis is essential for cell growth, replacement, and genetic consistency.
When considering whether a corn cell with 18 chromosomes is a gamete or somatic cell, it's important to know the diploid number of chromosomes for corn. For corn (Zea mays), the diploid number (2n) is 20, meaning somatic cells have 20 chromosomes organized in pairs, with one from each parent. Since gametes have half the number of chromosomes compared to somatic cells—making them haploid (n)—a corn gamete would have 10 chromosomes.
Referring to the reference information, a corn cell with 18 chromosomes would neither be a typical gamete nor a typical somatic cell, as it does not correspond with the normal haploid or diploid number for corn. However, it could occur in cases of polyploidy or other chromosomal abnormalities.
If a bean sperm cell is a gamete, then it would have half the chromosomal number of its corresponding somatic cell. Since somatic cells of beans have 22 chromosomes, a bean sperm cell would have 11 chromosomes. Furthermore, as the endosperm in corn is triploid (3n), resulting from the fusion of a sperm cell with two polar nuclei, a corn seed's endosperm would have 30 chromosomes (3 times the number of chromosomes in a corn gamete, which is 10).
Lastly, cells undergo mitosis to grow or replace cells, maintain genetic consistency across somatic cells, and allow asexual reproduction in certain organisms. This process is vital to the development and maintenance of multicellular organisms.
Why is Type O- the universal donor? Check all that apply.
A) Type O- has no antigens on its red blood cells, so the red blood cells can’t be attacked by antibodies of other blood types.
B) Type O- has antigens on its red blood cells, so the red blood cells can be attacked by antibodies of other blood types.
C) Type O- has no Rh antigen, so the red blood cells can’t be attacked by the Rh antibody.
D) Type O- has the Rh antigen, so the red blood cells can be attacked by the Rh antibody
Answer:
A) Type O- has no antigens on its red blood cells, so the red blood cells can’t be attacked by antibodies of other blood types.
C) Type O- has no Rh antigen, so the red blood cells can’t be attacked by the Rh antibody.
Explanation:
hope this helps
Type O- blood is considered the universal donor because its red blood cells have no A or B antigens, and it lacks the Rh antigen, preventing immune reactions when transfused into individuals of any other blood type.
Explanation:Type O- blood is referred to as the universal donor for specific reasons. Mainly, Type O- has no antigens on its red blood cells (RBCs), which means it generally does not initiate an immune response when transfused into individuals of any other ABO blood type. This absence of A and B antigens on the RBCs prevents antibodies in the recipient's plasma from recognizing and attacking the transfused blood cells. Additionally, Type O- blood does not have the Rh antigen, which is another common cause of blood transfusion reactions.
Therefore, the correct answers to the question are:
(A) Type O- has no antigens on its red blood cells, so the red blood cells can’t be attacked by antibodies of other blood types.(C) Type O- has no Rh antigen, so the red blood cells can’t be attacked by the Rh antibody.Why do particles in a colloid remain dispersed through out the mixture
Colloids are mixtures in which one or more substances are dispersed as relatively large solid particles or liquid droplets throughout a solid, liquid, or gaseous medium. The particles of a colloid remain dispersed and do not settle due to gravity, and they are often electrically charged.
Particles in a colloid remain dispersed due to their intermediate size and possible electric charges that prevent settling. The Tyndall effect, caused by light scattering, is a signature characteristic of colloids. Factors such as size and surface adsorption of ions or molecules contribute to the stability of these particles in a mixture.
Explanation:The question asks: Why do particles in a colloid remain dispersed throughout the mixture? A colloid is a special type of heterogeneous mixture where dispersed particles are spread evenly throughout the dispersion medium, which can be a solid, liquid, or gas. The particles in a colloid are of an intermediate size, larger than those found in a solution but smaller than those in a suspension, which prevents them from settling out upon standing.
The stability and dispersion of colloidal particles can be attributed to several factors. First, colloidal particles are large enough to scatter light, an effect known as the Tyndall effect. This scatters incoming light beams, making the colloidal mixture appear cloudy or opaque. Secondly, many colloidal particles acquire an electric charge when dispersed in a solution; like charges repel, thus keeping the particles from agglomerating and settling. Some colloids are stabilized by the adsorption of ions or molecules onto their surface, which can prevent the particles from coming close enough to coalesce or settle.
Examples include clouds, which are composed of water droplets of colloidal size, and milk, where dehydrated milk powder disperses spontaneously in water to form colloidal systems. In both examples, the colloidal particles remain dispersed and do not settle out due to their size and interactions at the molecular level. Colloidal particles can also be manipulated through an electrolytic cell, where they move towards an electrode carrying an opposite charge, leading to neutralization and coagulation as precipitates if conditions allow.
brian is talking about evolution with a friend the friend says its just a theory so i dont believe it when they prove it and it becomes the law of evolution then maybe ill change my mind which of these possible replies best describes scientific principles or the work of scientist?
God created the Earth.
He should be wary of science because it is based on research and evidence, not bias and opinion
How does a bacteria’s resistance to an antibiotic first arise? a.) vaccines b.) through mutation c.) bacteria learns to be resistant d.) bacteria decides to be resistant
Answer: option B through mutation
Explanation:
Antibiotic resistance is the phenomena in which the bacteria becomes reistance to a given antibiotic and is no longer killed or harmed by it.Bacteria unlike humand divide rapidly and increase in large number. However, each time it divides it has to replicate its genetic material. In the process of replication there is always a chance of introducing an error which is called as a mutation.The mutation that occurs in a bacteria can either ber advantageous or disadvantageous. However, amongst the various type of mutations that arise in the bacteria if a particular mutation is conferring resistance to an antibiotic then in such case the bacteris gets selected by natural selection.The bacteria having acquired thr resistance is then able to produce more of its progenies with the same antibiotic resistance and thus, this is how the resistance gets propagated.So, firstly the mutation is the one which gives rise to the resistance which is then spread among the bacterial population by the process of reproduction as well horizontal gene transfer.
Aerobic respiration and photosynthesis are both
A: ways to make glucose.
B: processes that happen in the chloroplasts.
C: important processes that happen in cells.
D: products of digestion.
What are the divisions of geologic time?
Geologic time divisions: Eon, era, period, epoch, age. Each reflects significant changes in Earth's history, aiding understanding of planetary evolution.
The divisions of geologic time, from largest to smallest, are:
1. Eon: The longest division of geologic time. The Earth's history is divided into four eons: Hadeon, Archean, Proterozoic, and Phanerozoic.
2. Era: Each eon is divided into eras. The Phanerozoic eon, for example, is divided into three eras: Paleozoic, Mesozoic, and Cenozoic.
3. Period: Each era is divided into periods. For instance, the Mesozoic era is divided into the Triassic, Jurassic, and Cretaceous periods.
4. Epoch: Each period is divided into epochs. The Cenozoic era's Quaternary period, for example, is divided into the Pleistocene and Holocene epochs.
5. Age: The smallest officially recognized division of geologic time. Ages are typically defined by the appearance and disappearance of fossil species.
These divisions help geologists and paleontologists to organize Earth's history and understand the sequence of events that have shaped our planet. The boundaries between these divisions are often marked by significant changes in the rock record, such as the appearance of new life forms, major extinction events, or shifts in Earth's tectonic activity.
what is the highest mountain in north america,how high is it?
the highest mountain in north america is denali, which is in alaska. it is 20,310 feet high.
Salt water is best described as _______.
A.
a mixture
B.
a compound
C.
a pure substance
D.
an element
Please help D:
Which is an immediate result of stopping the glycolysis process?
Answer:
A decrease in ATP production in the Krebs cycle
Explanation:
Apex
the different populations that interact with each other in the same are form a
Consists of organisms of the same species that live in the same area and interact with one another.
How does the cardiovascular system help the body maintain homeostasis?
A) osmosis and capillary action
B) capillary action and thermoregulation
C)thermoregulation and hormone transplant
D) hormone transplant and osmosis
B. Sounds like the best awnser to me.
A quick search provides me with this: In the kidneys, the cardiovascular system maintains homeostasis by providing adequate blood pressure that the kidneys utilize to filter toxins and waste from the blood and subsequently the body. The cardiovascular system also helps the skin in homeostasis by regulating body temperature. / Capillary action (sometimes capillarity, capillary motion, capillary effect, or wicking) is the ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity. The effect can be seen in the drawing up of liquids between the hairs of a paint-brush, in a thin tube, in porous materials such as paper and plaster, in some non-porous materials such as sand and liquefied carbon fiber, or in a cell. It occurs because of intermolecular forces between the liquid and surrounding solid surfaces. If the diameter of the tube is sufficiently small, then the combination of surface tension (which is caused by cohesion within the liquid) and adhesive forces between the liquid and container wall act to propel the liquid.
From this I would say your awnser is B.
C Thermoregulation and hormone transport
The Circulatory System delivers oxygen and nutrients in the blood to the surrounding cells to maintain Homeostasis. The blood in the Circulatory System is needed throughout the body so that other systems work properly. Like for instance the Nervous System has the brain, and the brain needs blood to function.
This is the colorless fluid surrounding the grana within the chloroplast.
The stroma is the colorless fluid that surrounds the grana within the chloroplast.
The stroma contains the enzymes of light-independent reactions. Thus it is the ground matrix of the chloroplast.
Answer:
stoma
Explanation:
How could coevolution lead to mimicry?
Answer:
Co-evolution would cause mimicry in case where there is probability of an species to survive just by mimicking the co-evolving species
Explanation:
Co evolution causes simultaneous evolution of organisms that are intimitate ecologically. For example – all organism that exhibit prey and predator are influenced by each other’s evolution and hence it is said that they co-evolve.
For instance –
Parasites such as cuckoos and cowbirds mimic their hosts. These parasites have evolved to produce eggs that are similar in appearance to that of host birds so that the predators could not distinguish between the two different types of egg.
Thus co-evolution would cause mimicry in case where there is probability of an species to survive just by mimicking the co-evolving species
Mimicry is the art of resembling between one organism and another. Mimicry may evolve between different species.
Mimicry is an evolutionary trait that is seen in birds, butterflies, and insects. Coevolution may lead to adaptation of the same properties. Mimicry can be visual, tactile, and acoustic. Maybe advantageous for both organisms to share the same pattern that provides them a selective advantage. A mimicry like that in stick insect that is endemic to the Australian eucalyptus tree can help it protect itself from predators and hence coevolve.Hence the coevolution can lead to mimicry and coexistence also known as mutualism.
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In order for plants and animals to be able to use nitrogen, N2 gas must first be converted to more a chemically available form. Review the picture of the nitrogen cycle. One type of organism is responsible for "fixing" nitrogen so other organisms can use the element. What organism is this? A) fungi B) plants C) animals D) bacteria
Can you add the picture or describe it to me? Right now I'd guess that it's probably bacteria because bacteria breaks it down into ammonium and nitrate, which is taken up by the plants by a process of nitrogen fixation. So, D.
Answer: Bacteria
Explanation:
The bacteria fix nitrogen in order to provide it to the plants. The nitrogen that is available in the atmosphere in the form that it cannot be used by the plant itself.
This form of nitrogen is converted into another form which can be used by the plants. The nitrogen fixing bacteria perform this process.
The nitrogen from the plants get transferred to the animals and then released into the environment integrated in the waste material.