explain why a mouse (an endotherm) would probably have wider bone rings than a similarly sized lizard (an ectotherm).

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.

Acell in the human nervous system whose primary function is to form myelin and the blood-brain barrier, respond to injury, remove debris, and enhance learning and memory is called a(n) cell.

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