Their source of carbon. Autotrophs obtain their carbon from inorganic sources such as from atmospheric carbon dioxide. Examples of autotrophs include plants, and euglena ( a protist).
Heterotrophs on the other hand, obtain their carbon from organic sources such as other organisms. Examples of heterotrophs include all secondary consumers, and decomposers.
Answer:
b. Because they have a low affinity for the H+
Explanation:
All electrons that enter the transport chain come from NADH and FADH2 molecules that are produced in earlier phases of cellular respiration: glycolysis, pyruvate oxidation and the citric acid cycle.
NADH is very good at donating electrons in redox reactions (that is, its electrons are at a high energy level), so you can transfer your electrons directly to complex I and transform it back into NAD +. The movement of electrons through complex I in a series of redox reactions releases energy, which the complex uses to pump protons from the matrix into the intermembrane space.
FADH2 is not as good for donating electrons as NADH (that is, its electrons are at a lower energy level), so it cannot transfer its electrons to complex I. Instead, it introduces electrons to the transport chain through complex II, which does not pump protons through the membrane.
Answer:
They always occur at convergent plate boundaries.
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The correct answer is
DNA polymerase is the enzyme that catalyzes the addition of a nucleotide onto the 3' end of a growing DNA strand. DNA polymerase adds nucleotides one by one to the 3’ end of the growing DNA chain, incorporating only those that are complementary to the “old” DNA strain.<span>The addition of nucleotides requires energy which comes from the nucleotides themselves (phosphates).</span>
Geologists in Egypt and Ethiopia are comparing rock samples from rocks found in the two countries. They are sharing information about the rocks to figure out whether they are the same or different types of rock. The information is as follows: Rock A formed from small pieces of rock.
