Which of the followings statements is true about cones? a. all of these statements are true. b. they are found in the fovea. c. they require higher amounts of light to be activated than the rods. d. they are responsible for color vision.

a. All of these statements are true

Explanation:

The fovea is a region of the retina that’s densely packed with cones, a type of photoreceptor (a cell that detects light). The other type of photoreceptor is the rod.  

While rods function at low light levels and allow night vision, they can’t distinguish color. In contrast, cones function at high light levels and provide color vision.  

That's why you can't perfectly distinguish colors in a dark place.

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.