Phospholipid molecules that prevent the alveoli from collapsing are known as ________
A) laryngitis B) plasma C) surfactant D) mucus
Answer: C
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If two species are close competitors, and one species is experimentally removed from the community, the remaining species would be expected to _____
A) eventually become competitively superior to the other species B) change its fundamental niche C) decline in abundance D) become the target of specialized parasites E) expand its realized niche
Estuaries are important nurseries because of the relatively low numbers of predators in these areas
Indicate whether the statement is true or false
Gatekeeper genes and caretaker genes are both involved in cancer, but gatekeeper genes can be distinguished from caretaker genes because gatekeeper genes _____ while caretaker genes _____
1.affect the mutation rate of all genes / normally prevent chromosomal instability and aneuploidy 2.mutate to stimulate uncontrolled cell division / encode proteins that limit the rate of cell division 3.control the cell cycle / encode proteins involved in DNA repair 4.all of the choices
Which is responsible for more cancer deaths in women: breast, colon and rectum, pancreas, or ovary?
A. breast B. pancreas C. ovary D. colon and rectum E. all are equal