Place the cellular processes responsible for animal development in the correct order: ____
a. induction ? differentiation ? determination
b. induction ? determination ? differentiation
c. determination ? induction ? differentiation
d. determination ? differentiation ? induction
e. differentiation ? determination ? induction
ANSWER: b
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Answer the following statement true (T) or false (F)
Which of the following does not reflect the action of an effector molecule on the transcription of a gene?
A. An effector binds to a repressor to decrease the level of transcription. B. An effector binds to a repressor to increase the level of transcription. C. An effector binds to an activator to increase the level of transcription. D. An effector binds to a polymerase to increase the level of transcription.
Fleas
A. may transmit Yersinia pestis. B. may transmit Lyme disease. C. may transmit a toxin. D. have only one host, humans.
People who attempted to plant Brazil nuts in hopes of establishing plantations of Brazil nut trees played roles most similar to those of _____
A) agoutis B) orchid bees C) pollen tubes D) harpy eagles