Brown [b] is recessive to black [B] in mice fur color. However, another gene controls the deposition of the pigment. The deposition of the
pigment is dominant [C] and no pigment deposition [C] is recessive
producing white fur.
The following cross was made:
bbCc X BBcc
What are the phenotypes of the offspring from this cross?
50% brown mice and 50% black mice
25% black mice, 25% brown mice and 50% white mice
50% black mice and 50% white mice
50% brown mice and 50% white mice

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explanation:

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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.  

what is this saying?