Answer:
C. Proton gradient
Explanation:
During electron transport chain, the electrons are comes from transport chain come from NADH and FADH₂. As electrons are travels down the chain, proton gradient develops across the inner mitochondrial membrane due to accumulation of high proton (H⁺) in the intermembrane space and a lower proton(H⁺) in the matrix. This proton gradient is used to syntheis ATP.
Answer:
proton gradient
Explanation:
Before 1800, most peppered moths in England were light–colored. During the Industrial Revolution, soot and industrial wastes darkened tree trunks. Gradually, the light–colored moths became rare, and the dark–colored ones became abundant. What role did natural selection play?
I need some help everybody.
The production of cells during mitosis into specialized function is called: recombination or differentiation
Answer:
recombination
Explanation:
Recombination occurs when two molecules of DNA exchange pieces of their genetic material with each other. One of the most notable examples of recombination takes place during meiosis (specifically, during prophase I), when homologous chromosomes line up in pairs and swap segments of DNA.
I have made a synthetic cell by placing a solution that is 10% sodium chloride inside a semipermeable membrane through which water can pass but not sodium chloride. If I place this cell into a solution that is 20% sodium chloride what will happen to the size of the cell? will it increase, decrease, or stay the same in size?
Which part of an angiosperm contains seeds?
leaf
fruit
spore
pine cone
Which number represents a basic pH, 4 or 9? _______
Numerical Answers Expected!
Answer for Blank 1:
I'll give brainly
Answer:
9
Explanation:
Any pH value above 7.0 is that of a base. Below that value is the pH of an acid.
its 9 i got it right on my test.
Which muscle cell structure stores calcium ions that are used to trigger the contraction?
The Sarcoplasmic Reticulum, a specialized endoplasmic reticulum in muscle cells, stores calcium ions that are necessary for muscle contractions.
Explanation:In the context of muscle cell structure, the specific structure that stores calcium ions which are needed to trigger the muscle contraction is called the Sarcoplasmic Reticulum. It's a specialized endoplasmic reticulum found in muscle cells that holds a high concentration of calcium ions.
When the muscle is signaled to contract, calcium ions are released from the Sarcoplasmic Reticulum, allowing the muscle proteins to interact and create movement.
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Photosynthesis occurs in both prokaryotes and eukaryotes.How do the location where photosynthesis occurs differ in prokaryotes and eukaryotes?
Answer:
In eukaryotes, it occurs in the chloroplast. In prokaryotes it does it in the cytoplasm.
Explanation:
Prokaryotes don't have organelles such as the mitochondria and the chloroplast, it just has cell membrane, which its only function is to protect the cell and is unable to generate chemical processes; the DNA, which stores and manages only the genes, which would be affected if exposed to a chemical process like photosynthesis; and the cytoplasm, which stores the materials that the cell needs, where photosynthesis occurs. Eukaryotes have chloroplasts, which absorb the sunlight and combine it with carbon dioxide and water to realize photosynthesis.
Answer:
C
Explanation:
it right on edmentum
The _____ is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell.1. plasma membrane2. nucleoid region3. ribosome4. pili5. cell wall
The answer would be the cell wall (5)
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~Just a girl in love with Shawn Mendes
Modern computers can store about as much information as the human brain. True False
its false I took the test
Which of the following statements is considered true of Neanderthals? A. They had some system of religious beliefs about afterlife. B. They had smaller brains than homo sapiens (modern humans). C. They evolved into homo sapiens. D. They emerged after the ice age.
Answer:
A. They had some system of religious beliefs about afterlife
Explanation:
The Neanderthals are one of the closest cousins to the modern humans, in fact, lot of people in Europe and Asia have small percentage of Neanderthal gene in them. Unlike the popular belief, the Neanderthals were not stupid, bulky, primitives, but instead they were much more evolved, had very large brain capacity, created art, and it is believed that they even had some system of religious beliefs about afterlife. The clue for the supposed system of religious beliefs about afterlife comes from a burial site, where a Neanderthal was buried with an ax, thus a weapon. When comparing such action with the human behavior, it resembles a lot to the ancient human beliefs about afterlife, where weapons and other objects were commonly left in the graves.
Answer:
They had some system of religious beliefs about the afterlife.
Explanation:
PENN
What is a phospholipid composed of?
a. a nonpolar head and a polar tail
b. a nonpolar head and tail
c. a polar head and a nonpolar tail
d. a polar head and tail
A phospholipid is composed of a polar head and a nonpolar tail. These components allow it to form a bilayer in cell membranes.
The correct option is c.
Explanation:A phospholipid is composed of a polar head and a nonpolar tail. The polar head is hydrophilic (water-loving), which means it is attracted to water.
The nonpolar tail, on the other hand, is hydrophobic (water-fearing), and not attracted to water.
This configuration makes phospholipids the perfect building block for cell membranes, and results in the formation of a phospholipid bilayer when in aqueous solutions, allowing them to separate the inside of a cell from its outside environment.
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Please help!
Biome : Arctic tundra
Organism : Penguins
1. In what type of ecosystem can this population be found?
2. How might this population suddenly increase? How might this affect the ecosystem
3. What might happen to the ecosystem if this population were removed?
Answer:
1) The ecosystem would have the abiotic factors of low precipitation, dry winds, and low temperatures. The biotic factors would include the animals living with the penguins such as polar bears and yaks.
2) The population would suddenly increase if either the penguin's predators had a drop in numbers or if the penguin's food source became more readily available. This growth in population would result in food becoming harder to find and predators once again growing in numbers. This would eventually cause the penguin population to shrink once more.
3) Predators would die out. Whatever organism(s) were the penguin's food source would grow in size exponentially. Other animals may suffer a drop in numbers if the penguin's predators choose to prey on them.
What organs comprise the respiratory system of a bird
Answer:
Paired lungs
Explanation:
Paired lungs comprise the respiratory system of a bird.
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Where is a bacterial cell's DNA found?1. ribosomes2. nucleus3. peroxisome4. nucleoid region5. capsule
Answer:
nucleoid region
Explanation:
What does an electrocardiogram measure?
A) Sound waves created by the closing of heart valves
B) The volume of blood moving through the heart chambers
C) The force of muscle contraction in the heart chambers
D) Action potentials moving through the heart muscle
Malthus studied limited resources and the impact of limited resources on human populations. How did these ideas contribute to Darwin's ideas?
A. Limited resources in an environment forces more genetic changes in individuals, allowing the species to evolve more quickly.
B. Limited resources in an environment means that the individuals of a species cooperate so that all individuals survive.
C. Limited resources in an environment forces some individuals to survive without food.
D. Limited resources in an environment means that not all individuals of a species will survive or reproduce at equal rates.
Answer:
Option (C).
Explanation:
Malthus had stated that the population growth was exponential. He explained the relationship between population growth and resources.
Malthus study on population growth and limited resources on human population has contributed to the Darwin's idea of evolution. Limited resources in a population allows the survival of some individual species only. Natural selection favors the selected population and species adapt in the environment and transfer beneficial allele to its next generation.
Thus, the correct answer is option (D).
Answer:
A
Explanation:
A large population of houseflies was sprayed with a newly developed, fast-acting insecticide. the appearance of some houseflies that are resistant to this insecticide supports the concept that
Final answer:
The presence of insecticide-resistant houseflies illustrates the concept of pesticide resistance and microevolution, where selective pressure from the use of pesticides leads to the survival and reproduction of resistant individuals, causing resistance to increase within the population over time.
Explanation:
The appearance of some houseflies that are resistant to a newly developed insecticide supports the concept of pesticide resistance and is an example of microevolution. This happens when a population of insects is subjected to a selective pressure, such as a chemical pesticide, and the few individuals that by chance carry genes that confer resistance to the insecticide are more likely to survive and reproduce.
Over time, these resistant genes are passed on to the offspring, and the resistance trait becomes more common in the population. Eventually, this could lead to the pesticide becoming ineffective, requiring higher doses or the development of a new pesticide. This cycle of development of insect resistance is a significant challenge in managing pest populations and has been observed since the usage of DDT in the 1940s.
We live in the Cenozoic era, and scientists know more about this era and the epochs it's divided into than any other time period. Why is this?
Scientists have a better understanding of the Cenozoic Era, the era we live in, because it is the most recent and its geological record is well-preserved, containing clear evidence of past life forms, including mammals' rise to dominance after dinosaurs' extinction.
We live in the Phanerozoic eon, within the Cenozoic era, which is known as the Age of Mammals. This era is divided into different periods and epochs, including the Quarternary period and the Holocene epoch. The Cenozoic era began about 65 million years ago and continues to present day. It's characterized by the emergence and dominance of mammals, including human ancestors, after the extinction of dinosaurs.
Scientists know more about the Cenozoic era than any other time period because it is the most recent and therefore the best preserved in the geological record. During the Cenozoic, most of the organisms that we share Earth with evolved. Additionally, the closer proximity in time allows for better preservation and study of fossils, giving us clearer evidence of past life forms and environments.
Throughout the Cenozoic, Earth experienced significant climatic and geographical changes, such as the ice ages and tectonic shifts. These shifts contributed to the evolution and distribution of species. The ongoing nature of these changes, as well as human interest in understanding our own origins, drives the in-depth study of this era.
Hearing the word rabbit may lead people to spell the spoken word hair as h-a-r-e. This best illustrates the outcome of a process known as
Answer:
D. Priming.
Explanation:
Final answer:
The process where hearing the word 'rabbit' influences the spelling of 'hair' as 'hare' is known as semantic priming, a cognitive process where one stimulus affects the response to another.
Explanation:
The scenario described in the question where hearing the word rabbit may lead people to spell the word hair as hare is an example of a cognitive linguistic process. This process is known as semantic priming, where exposure to one stimulus influences a response to a subsequent stimulus, without conscious guidance or intention. In this case, hearing 'rabbit' activates associated words and their spellings, which can influence how someone spells a similar-sounding word, leading them to choose 'hare' instead of 'hair'. Semantic priming is part of our cognitive processes and how we interpret and produce language.
1.
Double-ringed bases are ________.
purines
exempt from Chargaff's Rules
complementary with each other
pyrimidines
2.
Which of the following is not a characteristic of Chargaff’s Rule #1?
is also termed Chargaff's ratio
states that T = A and G = C
states that DNA composition varies among species
states that the ratio of adenine to thymine is equal, as is the ratio of guanine to cytosine
3.
What type of bonds are formed between complementary bases?
triple carbon to carbon bonds
hydrogen bonds
ionic bonds
polar covalent bonds
4.
_______ are single-ringed bases.
guanines
adenines
purines
pyrimidines
Answer:
1. Purines
2. States that DNA composition varies among species
3. Hydrogen Bond
4. Purines
Answer to #2 is a little iffy -- sorry
Explanation:
Pyrmidines have two rings
Purines have one ring
Complementary bases are connected by hydrogen bonds.
Final answer:
Double-ringed bases are purines, and Chargaff’s Rule #1 states that T = A and G = C, but it is not termed Chargaff's ratio. Complementary bases in DNA are connected by hydrogen bonds, and single-ringed bases are called pyrimidines.
Explanation:
1. Double-ringed bases are called purines.
2. A characteristic of Chargaff’s Rule #1 that is not accurate is that it is also termed Chargaff's ratio. The rule correctly states that T = A and G = C, and that DNA composition varies among species, as well as that the ratio of adenine to thymine is equal, as is the ratio of guanine to cytosine.
3. The type of bonds formed between complementary bases are hydrogen bonds.
4. Single-ringed bases are known as pyrimidines, which include cytosine (C) and thymine (T).
Study the image of this rock.
Which word best describes the rock's grain shape?
O jagged
O oval
round
ON
O smooth
Answer:
jagged
Explanation:
Ecosystems have trouble adjusting to short-term changes. true or false
Hello There!
This is a false statement. Ecosystems don't have trouble adjusting to short-term changes.
Have A Great Day!
Answer: False
Explanation:
Ecosystem can be define as the community of living beings which interact among themselves and with their surrounding environment.
The ecosystem undergoes a series of gradual changes called as succession which helps in overcoming any short or long term change in the ecosystem.
Hence, the statement Ecosystems have trouble adjusting to short-term changes is false.
Which of the following are indications for using parenteral nutrition? Select all that apply.
a. Paralytic ileus
b. Severe short bowel syndrome
c. Dysphagia
d. Coma
e. Good peripheral veins
f. Need for more kilocalories and nutrients
Answer:
tippy for my bung hole
Explanation:
tpppp my bung hole
Patients who are unable to maintain a sufficient oral intake of food or nourishment to meet their metabolic needs should have enteral tube feeding. Enteral feeding is frequently used by medical professionals with individuals who have dysphagia. Thus option A, B,C,F is correct.
What indications for using parenteral nutrition?Patients may require PN for a wide range of illnesses or conditions that affect nutrient digestion, absorption, or food intake.
Short bowel syndrome, GI fistulas, intestinal obstruction, critically ill patients, and severe acute pancreatitis are a few diseases and circumstances where PN is recommended.
Candidates for PN include critically ill individuals who cannot get enteral nourishment and whose nothing-by-mouth condition will persist longer than 4 to 5 days.
Therefore, Paralytic ileus, Severe short bowel syndrome, Dysphagia, Need for more kilocalories and nutrients are indications for using parenteral nutrition.
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Plants which produce their gametes in flowers are called: I know it's not gymnosperms. So which one is it?
angiosperms
vascular
antheridium
gymnosperms
Answer:
Plants which produce their gametes in flowers are called angiosperms.( first choice)
Plants that produce gametes in flowers are known as angiosperms, which include a wide range of plants such as herbs, shrubs, and most trees, and are characterized by having seeds within the ovaries of flowers.
Explanation:Plants which produce their gametes in flowers are called angiosperms. Unlike gymnosperms, which produce seeds in cones, angiosperms produce seeds within the ovaries of flowers. After fertilization, the walls of the ovary thicken and often develop into fruit, aiding in seed dispersal.
Angiosperms include a vast array of plants including grasses, herbs, shrubs, and most deciduous trees. The main parts of a flower are the sepals and petals, which protect the reproductive organs, such as the stamens that produce the male gametes (pollen grains) and the carpels that contain the female gametes (eggs within the ovules).
Select all the correct answers. Evolution is the process by which species developed and diversified over the course of Earth's history. All life on Earth started from simple, single-celled prokaryotes, but some species are more closely related than others. Scientists can find clues to these close evolutionary relationships by looking for common characteristics between organisms. Based on their anatomical similarities, which three of these organisms share a close evolutionary relationship? snake horse ladybug human bacteria
The correct answer is snake, horse, ladybug and human bacteria
What do you mean by evolution?
Evolution is the changing of the characteristics of a species over several generations and is based on the process of natural selection.The theory of evolution is based on the idea that all species are related and gradually change over time.Learn more about evolution below
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A scientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population.
A. Teach the two groups different tricks
B. Allow the two groups to breed with each other
C. Put the two groups in different environment
D. Have the two groups live in identical ecosystems
Answer:
C
If you put the 2 rats in different environments, you will not only observe the adaptations they use to survive in different environments, but what consequences will occur if they are in a unfamiliar environment
Answer: C. Put the two groups in different environment.
Explanation:
Speciation is the process in which new species develop from the parent or pre-existing species in due course of evolution. The following are the types of speciation.
1. Allopatric speciation: This results when the two populations of the same species, are separated geographically.
2. Sympatric speciation: This results when the two populations living in the same area diverge due to changes in the behavior, morphology and in genomic level. This results in reproductive isolation among members of the same species belonging to two distinct populations.
Among the options given, C. Put the two groups in different environment. is the correct option. This is because of the fact that this will favor allopatric speciation. As due to geographical barrier, the separated groups will develop traits different from the parent species. Hence, result in development of new species.
Plate divergence is best described a/an _______ process.
O A. orogenic
O B. isostatic
O C. taphrogenic
O D. epeirogenic
Answer:
C. taphrogenic
Explanation:
The plate divergence can be described as a taphrogenic process. The taphrogenic processes are the processes through which gaps occur in the crust, and the crust is moving away from the gap that has opened up. This is exactly how the divergent boundaries form. The strong convection currents of the mantle manage to crack the crust, and the magma manages to penetrate through it and melt it. As the magma reaches the the surface, it starts to come out, propelling itself upward, and as it cools of it creates new crust. The magma continues to come out, and more and more new crust is pilling up, pushing the old crust away from the divergent plate boundary.
Answer:
cinegorhpat
Explanation:
Under capitalism, the allocation of goods and services is determined by ________________________________.
consumers.
the government.
businesses.
free market forces.
Answer:
I believe it's D.
Explanation:
Hope my answer has helped you!
Answer:
businesses
Explanation:
The amount of radioactive isotopes contributing heat to Earth is greater now than it was when Earth was newly formed.
Question 20 options:
True
False
Answer:
false
Explanation:
The amount of radioactive isotopes contributing heat to Earth is less now than when Earth was newly formed because these isotopes have decayed over time, making the statement false.
The statement that the amount of radioactive isotopes contributing heat to Earth is greater now than it was when Earth was newly formed is false. Radioactive isotopes such as 238U, 235U, 40K, and 232Th have been providing heat to Earth's interior through radioactive decay. Initially, there were more of these isotopes when Earth was young, making the radioactive contributions and resulting heat greater. These isotopes decay over time, reducing their quantity and the heat they produce. Presently, the heat produced by radioactive decay is roughly 25% of what it was at Earth's formation.
Additionally, Earth's heat also comes from the initial deposit of heat left over from its formation and accretion, with energy contributions from impacts such as the one from Theia, which led to the creation of the Moon. However, it's the radioactive decay of primordial elements that still significantly contributes to Earth's internal heat, albeit less so than when Earth first formed.
The Milky Way is held together by a black hole's gravitational force. Since the stars near this black hole move at a high speed, what can you infer about the black hole? A. Its location B. Its depth C. Its speed D. Its size
Answer:
A. Location
Explanation:
A black hole is a massive structure in the space from which light cannot escape. Therefore, the depth of the black hole (B), the speed (C), and size (D) are extremely difficult to measure. However, scientists have been able to locate the position of black holes via the movement of stars and gases around it. Typically, since black holes are extremely dense objects, masses spins around the black holes and form a structure called an accretion disk. By looking at the speed of stars, the scientists can detect where the black holes are in the space.
Answer:
A. Its location
Explanation: