4. Why are coral reefs only found in tropical water? * (1 Point)
They need cold water with little sun
They need deep water and humid temperatures
They require shallow waters where the sun can reach them

The first generation of offspring from the cross of two parents is called the a. f1 generation b. f2 generation c. short generation d. p generation

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?