Theory of survival of the fittest
I think before a cell divides, its DNA is duplicated. Because the two strands of a DNA molecule have complementary base pairs, the nucleotide sequence of each strand automatically supplies the information needed to produce its partner.
Answer:
as electrons move through the electron transport chain they go from a higher to a lower energy level and are ultimately passed to oxygen (forming water). Energy released in the electron transport chain is captured as a proton gradient, which powers production of ATP by a membrane protein called ATP synthase
Answer:
D) can reveal alterations in chromosome number.
Explanation:
The karyotype is used to look for abnormal numbers or structures of chromosomes.
Karyotypes are prepared using standardized staining procedures that reveal characteristic structural features for each chromosome.