The bicoid protein of a fruit fly is an example of _____
a. embryonic induction
b. epigenetics
c. differentiation
d. a morphogen
e. assimilation
ANSWER: d
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If you allowed 10 identical parallel Salmonella cultures to evolve for 10,000 generations under new growth conditions with very little nitrogen, the parallel cultures would
A) evolve identical adaptations to use the nitrogen source provided in the media. B) not change or adapt very much over this small number of generations. C) each accumulate different random mutations resulting in different adaptations to use the nitrogen in the media. D) direct mutations to occur in nitrogen utilization and uptake genes in order to adapt rapidly to the culture conditions.
The genetic engineering of human-animal hybrids is a routine procedure related to assisted reproductive technologies
a. True b. False Indicate whether the statement is true or false
In conifers, the megasporocyte undergoes meiosis to produce four daughter cells. How many of these survive to develop into gametophyte(s)?
a. two b. three c. one d. four
Which hormone stimulates both leaf abscission and fruit ripening?
a. abscisic acid b. auxin c. cytokinin d. ethylene e. gibberellin