How do pancake tortoises protect themselves from predators?
a. Their coloration serves as a disguise.
b. They emit an undesirable scent.
c. They have large jaws with teeth.
d. They puff themselves up and become wedged in between cracks in rocks.
e. They retreat into their shell.
D
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Which of the following type of microscopy would be most effective in visualizing the fine structure of viruses and cytoskeletal filaments 10–25 nanometers in diameter?
A. standard light microscopy B. phase-contrast light microscopy C. transmission electron microscopy D. darkfield light microscopy E. differential-interference microscopy
Which structure in the earthworm's digestive tract is utilized for food storage?
a. crop b. esophagus c. gizzard d. intestine e. mouth
Mendel would not have seen four different
phenotypes in the F2 generation of his dihybrid crosses if a. the genes were on the same chromosomes. b. the P1 generation was homozygous. c. purple was dominant to white. d. more than two traits were traced. e. all of these are true.
Which Greek letter is typically used to represent water potential?
a. Greek letter ? b. Greek letter ? c. Greek letter ? d. Greek letter ?