How does an environmental factor such as overfishing affect genetic factors in a population?
a. overfishing will lead to increased genetic variation.
b. environmental factors do not affect genetic factors.
c. genetic traits that fish survive are more likely to be seen in future generations.
d. genetic traits that are targeted by the fishing industry are more likely to be seen in future generations.

Option C

Explanation:

The higher is the genetic diversity within a population of an organism, the higher will be the organisms ability to adapt itself in the changing environment. In case, the species of fishes which  are being over fished do not have sufficient number of individuals with varied genotype/allele for further mating, then the population and genetic diversity of that particular fish species would go down. However, the genetically stable species that could easily adapt themselves with in the changing environment or which have the ability to escape over fishing will maintain their genetic diversity and hence will survive easily.

Hence, option C is correct

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

as many times as you want