Which of these best describes the structural difference between the dna of bacteria and the dna of humans?
a) human dna is much more complex in structure.
b) bacteria do not have dna so there is nothing to compare.
c) all dna is made of the same components so there would be no difference.
d) bacteria dna contains 3 nitrogenous bases, while the human dna contains 4.

Compare the composition of the moon's surface with the composition of the earth's surface.

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?