During cell division the progeny of a trypanosome express a different VSG gene than their parents. Why is this done?
A. VSG genes inhibit phagocytosis.
B. To signal endocytosis of the parasites
C. VSG genes activate photoheterotrophy.
D. To hide from the host's immune system
Answer: D
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Examine Figure 23.2 in your textbook. If we define the taxon Actinopterygii to include the Ray -finned fish, Coelacanths, Lungfish, Tetrapods, and their most recent common ancestor, it would be a _____ group
A. monophyletic B. paraphyletic C. polyphyletic
Which hormone is critical to reducing the rise in blood glucose, fats, and amino acids that occurs after eating a meal?
A. glucagon B. insulin C. cortisol D. epinephrine E. growth hormone
Grana and thylakoids are structural components found in ____
a. nucleoli b. mitochondria c. ribosomes d. chromoplasts e. chloroplasts
Molecular evidence points to __________ as an
explanation for the great diversity of hormones and hormone receptors in vertebrates. a. polyploidy and nondisjunction b. gene duplications followed by mutations c. continental drift d. chromosomal translocations e. homeotic genes