You are currently studying the behavior and physiology of a vertebrate about which little is known. Based on what you know about other vertebrates, what would you predict would be the state of this animal when it was not in the fight or flight state.
A. Energy stores such as adipose tissue and glycogen are broken down to mobilize fatty acids and glucose.
B. The heart rate increases and airways are dilated to promote maximum oxygen intake.
C. Elevations in cortisol are needed to increase glucose.
D. Catabolic hormones are activated.
E. Leptin levels are increased to enhance appetite.
E. Leptin levels are increased to enhance appetite.
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Suppose you take a cell from an adult cow and attempt to use it to produce a clone of that cow. If for
some reason telomerase is not functioning in that cell or in any cell that comes from it, what will you expect to happen with your clone?
a. The cell will never be able to divide at all. b. When the clone grows up, it will most likely have cancer. c. The cell may divide, but after a certain number of divisions, cell division will stop. d. The lack of telomerase should have no effect on the clone. e. When the clone grows up, it will most likely be sterile.
In viruses, the capsid
a. is composed of DNA or RNA. b. destroys the viral DNA or RNA. c. is never present. d. consists of many genes. e. may be involved in attachment of the virus.
Which of these events occurred most recently in the history of Earth?
a. formation of oxygen b. first humans c. evolution of land plants, fungi, and land animals d. origin of eukaryotes e. origin of multicellularity
An organ that secretes both digestive enzymes into the small intestine and hormones into the blood is the _______.
A. liver B. appendix C. small intestine D. pancreas E. gall bladder