The surface of the amphibian egg farthest from the nucleus, the yolk-rich hemisphere of the egg. From: vegetal hemisphere in A Dictionary of Genetics »
Why is it called a vegetal pole?
Naming. The animal pole draws its name from its liveliness relative to the slowly developing vegetal pole. Hence the vegetal pole is named for its relative inactivity relative to the animal pole.
What is a vegetal pole in biology?
Definition of vegetal pole : the point on the surface of an egg that is diametrically opposite to the animal pole and usually marks the center of the protoplasm containing more yolk — see blastula illustration.
What is animal vegetal axis?
The animal/vegetal axis of an oocyte is defined by the placement of the nucleus in the oocyte and can sometimes be identified by the asymmetric placement of other substances such as yolk in the oocyte. The pole of the egg that is closest to the nucleus defines the animal end, with the axis passing through the nucleus.
What does the vegetal pole become?
Cells near the opposite end, the ‘vegetal’ pole, become other parts, or grow into entirely separate structures to nurture the embryo. The growing embryo is organized around an axis between these two poles.
What is the animal vegetal axis?
What does vegetal pole become?
Where does the ovum receive the sperm?
Complete answer: Ovum receives the sperms where nucleus is present and there sperm penetrates the ovum and sperm’s nuclei to fuse with the nucleus of ovum to form the zygote. Ovum acquires a polarity between the two poles and they become distinct. > Option A which is a vegetable pole.
What’s the difference between animal pole and vegetal pole?
Animal pole is that region of the ovum where polar bodies are extruded and it receives the sperm while Vegetal pole is that pole which is opposite to the animal pole. Animal poles are the most active part of the protoplasm whereas the vegetal pole is not the most active part of the protoplasm.
Where is acrosome located?
sperm nucleus
The acrosome is a unique membranous organelle located over the anterior part of the sperm nucleus that is highly conserved throughout evolution. This acidic vacuole contains a number of hydrolytic enzymes that, when secreted, help the sperm penetrate the egg’s coats.
