B and T lymphocytes are specific; they have only a single type of cell marker on their surface.
Answer the following statement true (T) or false (F)
False
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The evolution of petals through the AP3 gene is best explained by
A. a new gene mutation. B. the modification of an existing gene for a new function. C. homoplastic convergence. D. gene duplication and divergence. E. conserved genes.
How is a gradient of H+ ions formed across the inner mitochondrial membrane?
A. The electron transport chain uses energy from transfer of an electron donated by NADH to pump H+ across the inner mitochondrial membrane against its electrochemical gradient. B. ATP synthase generates a H+ gradient across the inner mitochondrial membrane. C. Electrons move from NADH to a chain of proteins with lower electronegativities. D. The electron transport chain uses ATP to pump H+ across the inner mitochondria membrane against its electrochemical gradient. E. The electron transport chain of proteins contains pores that are leaky to H+.
The study of the practical uses of microbes in various industries and technologies is ________.
A. applied microbiology B. microbial ecology C. bioengineering D. biotechnology E. industrial microbiology
Individuals best suited to their environment survive and reproduce most successfully. This idea is known as...
a) descent with modification b) struggle for existence c) survival of the fittest d) common descent