Refer to the paragraph above on the venom of marine core snails. What is the adaptive value of this toxin? I) It would cause muscle spasms in the prey. II) It would result in paralysis of the skeletal muscle of the prey
III) It would stimulate digestive tract smooth muscle to cause nausea and vomiting of the prey. A) only I
B) only II
C) only III
D) only I and II
B
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Blood agar is both a differential and enriched medium.
Answer the following statement true (T) or false (F)
How does primary protein structure affect the function of protein enzymes?
A) Substrates interact with R-groups at the enzyme's active site. B) Substrates interact with R-groups at the enzyme's external surface. C) Substrates interact with hydrophobic R-groups at any region of the enzyme. D) Substrates permanently bind to R-groups at the enzyme's active site.
Four of the five answers listed below are characteristic of meiosis. Select the exception
a. involves two divisions b. reduces the number of chromosomes c. results in producing genetically identical cells d. produces haploid cells e. occurs in the gonads
The difference between intrapleural pressure and intra-alveolar pressure is
A) the driving force for air flow into and out of the lungs. B) zero. C) atmospheric pressure. D) approximately 100 mm Hg. E) transpulmonary pressure.