If a mutation in UASg prevents Gal4 from binding, a possible consequence is:

a. The mediator will not bind to the polymerase.
b. Transcription will be silenced
c. Gal4 will be transcribed at trace levels
d. RNA polymerase will not be stabilized at the promoters of gal 1, 7, and 10
e. All of the above

Option B.

Transcription will be silenced.

Explanation:

Gal4 is a transcription factor that regulate gene expression in a positive way. It is a year protein that regulates gene induced by galactose. It lies upstream of the activating sequence and activate them. It binds to 17 basepair sites of the upstream activating sequence(UAS). If USAg prevents Gal4 from binding, transcription will be silenced.

b. the carbon cycle ensures living things have a source of hydrogen

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.