The genetic switch for the infection pathways of lambda phage is controlled by two regulatory proteins: ________ and ________
A) lambda repressor, Cro
B) lambda repressor, permease
C) excisionase, integrase
D) recA, Cro
E) lyase, lysogenase
A
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The evolution of multicellularity was important for organisms for all of the following reasons
EXCEPT?
a. It allows for the creation of a sustainable internal fluid environment. b. It allows for occupation of diverse habitats. c. It allows for cellular specialization. d. It allows for an increase in the size of an organism. e. It allows for mutualisms with single cell organisms.
Where a cold, dry season alternates with a cold, rainy season, __________ dominate. Fill in the blank(s) with the appropriate word(s)
Genes for regulatory elements, such as creb, were found to be important in animal learning. Which of the following would increase the probability that such an element is studied throughout the animal kingdom?
A) its unique sequence in Drosophila B) the finding that creb is highly conserved C) the number of repeats of the creb gene D) the interaction of creb with cAMP E) the finding that creb activates odor perception
The ________ have shells composed of calcium carbonate and thin pseudopods.
A. Amebozoa B. Euglenids C. Ciliates D. Dinoflagellates E. Foraminifera