Which is an example of a scientific hypothesis?
1 How will climate change affect forests and plants on dry land?
2 In horizontal rock layers, the oldest layer is at the bottom.
3 The outer layer of Earth is divided into “plates” that move across Earth's surface.
4 If salt is added to water, then the water will take longer to freeze because the salt causes more heat in the
mixture.

Two male mice, which we will call male a and male b, are both phenotypically normal. male a was from a litter that contained half phenotypically normal mice and half dwarf mice. the mother of male a was known to be homozygous for the normal igf2 allele. male b was from a litter of eight mice that were all phenotypically normal. the parents of male b were a phenotypically normal male and a dwarf female. male a and male b were put into a cage with two female mice that we will call female a and female b. female a is a dwarf and female b is phenotypically normal. the parents of these two females were unknown, although it was known that they were from the same litter. the mice were allowed to mate with each other, and the following data were obtained: female a gave birth to three dwarf babies and four normal babies. female b gave birth to four normal babies and two dwarf babies. which male(s)mated with female a and female b? male a with both females male a with female b, and male b with female a male a with female a, and male b with female b could not be determined male b with both females

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

How does friction with the atmosphere affect the speed of an artificial satellite