I have a couple biology questions that I would love some help with! 8. The number of different genes that control a trait determine the
a. allele frequencies for the trait.
b. number of phenotypes for the trait.
c. size of the gene pool.
d. chance that natural selection will occur.

14. Derived characters appear in

a. recent parts of a lineage but not its older members.
b. common ancestors of a group of species but not the species themselves.
c. organisms that have undergone convergent evolution.
d. index fossils but not other fossils.

answer: c

explanation:

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.