When the male pronucleus and the female fuse the process is called what? amphimi

Question

When the male pronucleus and the female fuse the process is called what? amphimixis activation capacitation aeration Immediately after fertilization the new cell is called a(n) Embryo zygote chorion blastomere The rudiments of all major organ systems are present by the of the trimester, middle first end;first middle;second end;second beginning: third ring pr development when does the fetus become "distinctively human" looking? first trimester second trimester third trimester birth All organ systems are functioning by the early portion of the third trimester. true false The first cleavage produces two identical cells called what? embryo zygote chorion blastomere In the outer layer of cells that separates the external environment from the internal blast is the ___ trophoblast pre-embryo morula blastomere cell mass In the blastocyst the trophoblast will form the embryo. true false

Explanation / Answer

16. Amphimixis

The fusion of male and femake pronucleu is called amphimixis.

17. zygote

Immediately after fertilization the united egg and sperm is called as a zygote.

18. By the end of first trimester

19. Second

In the second trimester the organs and organ systems complete most of their development and the foetus look distinctly human like.

20. False

Most of the organ systems develop during third trimester and they continue to grow and mature.

21. Blastomeres

Some 36 hours after fertilization,the first cleavage division produces two identical cells called blastomeres.

22. Trophoblast

The outer layer of the blastocyst consists of cells called the trophoblast.

23. False

The trophoblast gives rise to placenta.

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