1. How many types of nucleotides are in DNA, and how do they differ?

2. How are the base pairing rules
related to Chargaff’s research on DNA?

3 .Explain how the double helix model of DNA built on the research of Rosalind Franklin.

4. Which part of a DNA molecule carries the genetic instructions that are unique for each individual: the sugar-phosphate backbone or the nitrogen-containing bases? Explain.

5. In a sample of yeast DNA, 31.5% of the bases are adenine (A). Predict the approximate percentages of C, G, and T. Explain.

6.The DNA of all organisms contains the same four bases(adenine, thymine, cytosine, and guanine). What might this similarity indicate about the origins of life on Earth?

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.  

im not intirely sure but i think the anwser is d relative humidity