A lichen is a mutualistic relationship between a fungus and an alga
Indicate whether the statement is true or false
TRUE
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In evolution, the study of vertebrate forelimbs is related to _______ evidence.
Fill in the blank(s) with the appropriate word(s).
Recombinant DNA refers to the
A) study of bacterial ribosomes. B) study of the function of genes. C) interaction between human and bacterial cells. D) synthesis of proteins from genes. E) DNA resulting when genes from one organism are inserted into another organism.
This molecule or ion never uses active transport as its motive force for reabsorption into blood capillaries in the kidney.
A. Cl- ions B. Glucose C. Water D. HCO3- ions E. Na+ ions F. Amino acids
You are having lunch with an elderly friend when suddenly he begins to experience chest pain and tightness. He reaches into his pocket, gets out one of his nitroglycerin tablets and quickly takes it. After the episode passes, your friend asks you how the nitroglycerin helps his angina. You explain that nitroglycerin gets converted by cells to nitric oxide (NO) causing the smooth muscle cells of
the blood vessel to relax and increase blood flow to the heart. He pushes you for a more detailed explanation, so you explain further that: A. NO activates guanylyl cyclase, which catalyzes the synthesis of cGMP, which acts as an intracellular messenger in a pathway leading to smooth muscle relaxation. B. NO activates a protein kinase which catalyzes the synthesis of cGMP, which acts as an intracellular messenger in a pathway leading to smooth muscle relaxation. C. NO inhibits guanylyl cyclase, which allows the build up of cGMP, which acts as an intracellular messenger in a pathway leading to smooth muscle relaxation. D. NO activates cGMP, which catalyzes the synthesis of guanylyl cyclase, which acts as an intracellular messenger in a pathway leading to smooth muscle relaxation.