Caddisflies are insects that lay their eggs on the bottom of streams. The eggs mature into larvae, and eventually the larvae pupate, move to the surface of the stream, shed their pupal membranes, and emerge as winged adults. Caddisflies demonstrate
A) incomplete metamorphosis.
B) complete metamorphosis.
C) alteration of generations.
Answer: B
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How does the amount of yolk relate to the nourishment of the organism?
a. An egg with a small amount of yolk contains all of the nutrients for the embryo's development. b. An egg with a large amount of yolk contains all of the nutrients for the embryo's development. c. An egg lacking yolk contains all of the nutrients for the embryo's development. d. There is no relationship between the amount of yolk and the nourishment of the organism. e. All animal eggs have the same amount of yolk and provide the same amount of nourishment.
Signaling molecules secreted by one individual that modify the behavior of others are:
a. corticosteroids b. pheromones c. releasing hormones d. inhibiting hormones e. glucocorticoids
One hypothesis explaining the first nucleated eukaryotic cell is based upon the fusion of an archaeon and a bacterium that, over time, saw archaeal genes involved in metabolism being lost while bacterial genes involved in information processing were also degraded.
Answer the following statement true (T) or false (F)
What type of mutagen would you use if you wanted to study the effect of pyrimidine dimers in causing cancer?
What will be an ideal response?