[100 points]
1. explain why water is the universal solvent. complete sentence, and use the word solubility or dissolve.

2. what is a polar molecule? explain. use the words positive, negative, and charge.

3. which end of water molecule is negative? which end is positive?

Which of the following is one of the four conditions necessary for natural selection to occur in a population? fewer organisms are born than the habitat can support mutation does not occur organisms have identical characteristics variation is inherited

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

Restriction enzymes are used in making recombinant dna. describe the role restriction enzymes perform when constructing recombinant dna.