Your answer would be... B. The climate on Earth has changed over time.
Answer:
Signposts that determine the fate of cells.
Explanation:
Embryos for humans and other animals often look alike at certain developmental stages because they share ancient genes. This expression means that a more advanced organism, like humans, will resemble less advanced species during it's development stages.
Answer:
All multicellular organisms use cell division for growth and the maintenance and repair of cells and tissues. Cell division is tightly regulated because the occasional failure of regulation can have life-threatening consequences.
Bipedalism is a form of terrestrial locomotion where an organism moves by means of its two rear limbs or legs.
(ostrich, human etc. )