Which factor best explains why liquid water exists on earth

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

Which enzyme is responsible for “unzipping" the dna by breaking the hydrogen bonds between the nucleotides?

The offspring of a black cat and a white cat is a gray cat, it has the genotype bw if a black cat mates with a gray cat the chance that the offspring is white will be what percent?