When faced with a sudden drop in environmental temperature, an endothermic animal will ________.
A. experience a drop in its body temperature
B. wait to see if it goes lower
C. increase muscle activity to generate heat
D. add fur or fat to increase insulation
Ans: C. increase muscle activity to generate heat
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Which of the following steps occurs third during yeast Ty element transposition?
A. packaging of RNA in a VLP along with reverse transcriptase, a protease, and integrase B. transport of Ty RNA into the cytoplasm where it is translated into VLP proteins C. transcription of Ty element in the nucleus D. "infection" of nucleus with VLP E. Conversion of mRNA into double-stranded DNA with reverse transcriptase
The different globin genes in each cluster are sequentially expressed in tightly controlled patterns during the various stages of prenatal and adult development
What gene structure helps regulate globin gene transcription by controlling both the timing and the starting point for transcribing DNA into mRNA?
Brown and Goldstein discovered the mechanism of cholesterol uptake by studying fibroblasts from children with which disease?
a. Chronic fatigue syndrome b. Familial hypercholesterolemia c. Lupus erythematosis d. Cystic fibrosis
Most mammals, most cartilaginous fish, some amphibians, and a few reptiles have young developing within the female and obtaining nutrients from her blood, a relationship known as ________.
Fill in the blank(s) with the appropriate word(s).