Power Words
- zygote- the single cell formed from the union of male and female sex cells
- embryo-the first 8 weeks of embryonic development
- fetus-the unborn, young organism having a basic structural resemblance to the adult animal. All major organs are present at this time.
- fertilization-the union of male and female sex cells during sexual reproduction. In plants, this is called pollination and in humans it is called insemination.
- phylogeny- the embryonic development of a related group of organisms, like vertebrates. They are all in the same phyla.
- ontogeny-the embryonic development of a single species, like humans.
zygote- 1 cell
embryo- 1 million cells
newborn- 2 trillion cells
adult- 100 trillion cells
No comments:
Post a Comment