Biology Questions and Answers
Embryonic
Development
- What is the cell division
process directly related to the
embryonic growth?
The embryonic growth depends directly
on mitosis.division the zygote divi Through this typdes itself ge of celliving (^)
birth to a series of cells that by mitosis
organs ualso compose dntil the ifferentiated tissues anformation of a completed^
individual.
- What is the function of the
vitellus in the vertebrate egg?
How are these eggs classified
according to the amount of
vitellus within them?
Vitellus (yolk) that accumulates in is the nutritive materialthe cytoplasm of
the egg (zygote) with nourishing the embryo. Accordinthe function ofg to th (^) e
amount of vitellus in them, the
vertebratoligolecithal (littlee eggs are classified as yolk), centrolecithal, (^)
or heterolecithal (more yolk diffusely
distributed) concentrated and telolecithalin one end of the egg). (more yolk
- What are the animal pole
and the vegetal pole of the
vertebrate egg?
The animal pole of a telolecithal egg is
the portion oit is opposite to f the egg with little vitellus,the vegetal pole which
is the region where the yolk is
concentrated.- What are the four initial
stages of the embryonic
development?
The four initial stages of the embryonic
development are the morula stage, thblastula stage, the gastrula stage and e
the neurula stage. - What is the cell division
during the first stage of the
embryonic development
called? How is this stage
characterized?
The cell division iembryonic developments is calledn the first stage o f the
cleavagseveral mitoses occur fe, or segmentation.rom th In this stagee zygote
forming the new embryo. - What are the cells produced
in the first stage of the
embryonic development
called?
The cells that result fr(the first stage of the embryonicom the cleavag e
development) arthis stage the embryo is called e called blastomermorulaes. In
(similar to a “morus”, mulberry).
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