ZOO501 Quiz 2 Topics 85-119

MUHAMMAD IMRAN · ZOO501-Developmental-Biology · Quiz No.2 · Topics 85 to 119

1. This streak is first visible as a thickening of the …..at the posterior region of the embryo, just anterior to Koller's sickle___________________________________________________________________________ epiblast
2. The prechordal ……. induces the formation of the forebrain; the chordamesoderm induces the formation of the midbrain, hindbrain, and spinal cord______________________________________________________ plate
3. discoidal meroblastic cleavage occur in ________________________________________ birds and reptiles
4. Between the area pellucida and the area opaca is a thin layer of cells called the …..or marginal belt

_________________________________________________________________________ marginal zone

5. It will induce the uterine cells to form the maternal portion of the placenta, the ….. ______________ decidua
6. Chorion is derived from ……. Cell_________________________________________________ trophoblast
7. only the cytoplasm of the blastodisc becomes the embryo, this type of meroblastic cleavage is called discoidal

present in ______________________________________________________________ fishes

8. Neurulation in ……is exclusively secondary. ______________________________________fishes
9. The mammalian oocyte is released from the ovary and swept by the ……into the oviduct ._________ fimbriae
10. The cells adjacent to the chordamesoderm, the paraxial mesoderm cells, are the precursors of the in………… fishe_________________________________________________________________ mesodermal somites.
11. The rudiment of the central nervous system, is called __________________________________ neurulation
12. Fraternal twins are the result of ….separate fertilization events. ___________________________________two
13. Fishes, ……., and birds undergo discoidal meroblastic cleavage, wherein the early cell divisions do not cut through the yolk of the egg.__________________________________________________________________ reptiles