What are the characteristics of the animal and vegetal poles of the egg?
What will be an ideal response?
ANSWER: The egg nucleus is typically located at the animal pole of the egg. The animal pole
generally gives rise to surface structures and the anterior end of the embryo. The opposite
end of the egg is called the vegetal pole and typically gives rise to internal structures such
as the gut and the posterior end of the embryo. Yolk, when unequally distributed in the egg
cytoplasm, is most commonly concentrated in the vegetal half of the egg.
You might also like to view...
The most common reason for infertility in women that can be overcome by IVF is
____________________. Fill in the blank(s) with the appropriate word(s).
Removal of herbal medicines from USDA regulation by the DSHEA in 1994 led to
A. marketers proving that the medications work. B. marketers providing misinformation about the effectiveness of the herbal medicines. C. decreased use of herbal medicines. D. none of these.
A lack of a functional TP53 gene __________.
a) causes a cell carrying damaged DNA to be destroyed b) causes a cell carrying damaged DNA to fail to be destroyed c) will allow genetically unstable cells to continue to divide d) will stop genetically unstable cells from dividing
White blood cells
A) are formed in the spleen. B) carry oxygen in blood. C) clot blood. D) protect the body from microbes.