Mutagens such as pollutants and uv light can cause mutations in dna to occur at a higher rate than normal. these mutations may be beneficial in some cases, but often they lead to cancer. which of the following best describes how cancer cells affect the body?
a. they cause the immune system to produce antibodies, which attack healthy cells along with the cancer cells.
b. they consume normal cells and use them as fuel to reproduce and attack more healthy cells.
c. they have an abnormally short cell cycle, and they die faster than the liver is able to remove them from the body.
d. they take nutrients needed by healthy cells, and as they grow they interfere with the function of normal cells and organs.

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.  

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