A large number of breeding birds in Yellowstone nest and feed in stands of aspen, willow and cottonwood. How do you think the return of the wolf will impact these populations? a. By increasing tree abundance, wolves will directly reduce bird population sizes. b. By decreasing tree abundance, wolves will indirectly reduce bird population sizes. c. By increasing tree abundance, wolves will indirectly boost bird population sizes. d. Because wolves do not directly interact with trees, they are unlikely to impact bird population sizes.

C is correct. By increasing tree abundance, wolves will indirectly boost bird population sizes.

Explanation:

Without wolves keeping them on their toes, elk mow down lush willows aspen, cottonwood and other vegetation along rivers and streams.

By introducing wolves the bird species who nest in those trees will have more space to nest, thus their population sizes will increase.

answer; i believe the correct answer is (sporophyte);

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.