What form of bacterium is shown in this photomicrograph?
What will be an ideal response?
Spirilla
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The eastern indigo snake often makes its home in abandoned gopher tortoise burrows. How would you characterize this relationship and its effect on each member?
A. parasitism: positive for snake, negative for tortoise B. amensalism: negative for snake, neutral for tortoise C. commensalism: neutral for snake, neutral for tortoise D. amensalism: neutral for snake, negative for tortoise E. commensalism: positive for snake, neutral for tortoise
Put the following events in the proper order:i
Pollen tube develops. ii. Pollen grain lands on the stigma. iii. Sperm fertilizes the egg.
a. i, ii, iii b. i, iii, ii c. ii, i, iii d. iii, ii, i
Assume that in guinea pigs, dark brown fur (B) is dominant to black fur (b). If you mate a black guinea pig with a homozygous brown guinea pig, what proportion of the progeny will be homozygous?
A) none B) 1/4 C) 1/2 D) 3/4 E) all
Which of the following statements is TRUE regarding pyruvate and glucose?
a. Glucose easily passes in and out of mitochondria, and can often be found in the mitochondrial matrix. b. None of the other answer options is correct. c. Glucose and pyruvate are remarkably similar in structure, with both molecules possessing a ring shape. d. Both glucose and pyruvate can feed directly into the citric acid cycle, although acetyl-CoA is the preferred reactant for this process. e. Pyruvate is typically "trapped" in the intermembrane space of mitochondria, where it is oxidized to form acetyl-CoA.