do you think it is justifiable to consider James Buchanan as one of America’s weakest presidents? Why or why not.

Apart of an ecosystem that can restrict the growth of a population is referred to as

If a baby girl guinea pig looks almost identical to its mother, does this then mean that it inherited more alleles from its mother? explain. (hint: think about the vocabulary words dominant and recessive.)

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations