Briefly discuss physiological mechanisms that regulate body temperature in endotherms. What will be an ideal response?

One reason that prokaryotic genes do not contain introns is that

A) the introns are cut out during binary fission. B) due to the short time the bacterium is around as a single organism, a 5' cap and poly (A) tail are added immediately for translation to take place. C) bacterial proteins are very short and not subject to mutation. D) translation sometimes begins before transcription has been completed because prokaryotes do not have a nucleus. E) integrated viral DNA is not recognized for transcription.

What are the non-coding segments of DNA

called?

a. introns b. exons c. inseqs d. excisors e. incisors

A population of white-footed mice becomes severely overpopulated in a habitat that has been disturbed by human activity. Sometimes intrinsic factors cause the population to increase in mortality and lower reproduction rates in reaction to the stress of overpopulation. Which of the following is an example of intrinsic population control?

A) Owl populations frequent the area more often because of increased hunting success. B) Females undergo hormonal changes that delay sexual maturation and many individuals suffer depressed immune systems and die due to the stress of overpopulation. C) Clumped dispersion of the population leads to increased spread of disease and parasites resulting in a population crash. D) All of the resources (food and shelter) are used up by overpopulation and much of the population dies of exposure and/or starvation. E) Because the individuals are vulnerable they are more likely to die off if a drought or flood were to occur.

Which of the following statements regarding metabolism is FALSE?

a. ATP is formed in catabolic reactions. b. Heat may be released in both anabolic and catabolic reactions. c. Anabolic reactions are degradative. d. ADP is formed in anabolic reactions.