# No explaination is needed 24. Similarity resulting from common ancestry is known as a) homology b)...

###### Question:

no explaination is needed
24. Similarity resulting from common ancestry is known as a) homology b) convergent evolution. c) divergent evolution. d) heterogeny 25. Which of the following statements concerning the loss of hind limbs during whale evolution is NOT true? a) The loss is well documented by a series of transitional fossils. b) It explains why modern whales have vestigial pelvic girdles. c) This evolutionary process involved changes in the sequence or expression of Hox genes. d) The loss of limbs by snakes is a similar adaptation to a similar environment. 26. All major endocrine glands are controlled by the a) thyroid gland. b) gonads. c) pituitary. d) adrenal gland. 27. Which hormone of the adrenal gland promotes the short term stress response ("fight or flight"? a) Epinephrine b) Thyroxine c) Testosterone d) Cortisol 28. Which type of cells form the myelin sheaths around axons: a) astrocytes. b) schwann cells. c) adjacent nerve cells. d) muscle cells. 29. When an electrical impulse arrives at a chemical synapse, neurotransmitters are released. These act by a) opening ion channels in the postsynaptic membrane. b) opening ion channels in the presynaptic membrane. c) increasing the ion concentration in the synaptic cleft. d) physically connecting pre- and postsynaptic membranes 30. During muscle contraction a) actin and myosin filaments slide past each other. b) actin filaments become shorter. c) myosin filaments become shorter. d) actin and myosin filaments fold, 31. Which of the following are obligate intracellular pathogens a) Antibiotics b) Viruses c) Probiotics d) Thermophilic bacteria pto

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