Proto-oncogenes are genes that promote the development of tumors

Indicate whether the statement is true or false


FALSE

Biology & Microbiology

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When mangroves and seagrasses are reduced or damaged all occur except:

a. coastal erosion. b. reduction of productivity. c. reduced nursery grounds. d. increased primary production. e. increased sedimentation from land sources transported onto offshore coral reefs.

Biology & Microbiology

The average weather condition an area receives over a long period of time is called the

a. forecast b. climate c. weather range d. precipitation range e. humidity range

Biology & Microbiology

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

Biology & Microbiology

Which sequence of events describes natural selection?

A) A population of a mammal species varies in the length of their legs; water levels rise and the habitat becomes swampy; the individuals with shorter legs are better able to swim to food; the population evolves to become shorter-legged. B) A population of a mammal species lives near the water; water levels rise and the habitat becomes swampy; the animals have trouble moving in the water; the population changes to a shorter-legged type so they can move more easily in the water. C) Water levels rise, and a habitat becomes swampy; a population of a mammal species on high ground observes the change; individuals with shorter legs migrate to the area. D) A population of a mammal species lives near the water; water levels rise and the habitat becomes swampy; the act of swimming shortens the legs of the mammals; the offspring of the mammal species have shorter legs.

Biology & Microbiology