Most deaths among endangered Florida panthers are caused by disease
a. True
b. False
ANSWER: False
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There are cases, particularly in fruit flies, in which a normal body part grows in the wrong spot. For instance, legs on the head growing instead of antennae, or a second set of wings behind the normal pair. What can explain this?
A. These are due to the reappearance of stem cells, which are totipotent. B. These are due to misregulation of hormones from environmental contamination with pesticides. C. These occur as a result of mutations in homeotic genes, which normally act to direct development along the anterior-posterior axis. D. These naturally occur sometimes in animals that have metamorphic development, due to different organization of homeotic gene expression in larvae versus adults.
The first vaccine created was for
a. hepatitis B. b. influenza. c. small pox. d. cholera. e. diphtheria
Which of the following are not proteins of the immune system?
What will be an ideal response?
Which of the following individuals is most likely to have the greatest bone density?
A) A person who walks 30 minutes a day B) An astronaut who has been in space for an extended time C) A person who has been chronically ill and in bed D) A computer programmer