Explanation:
making hypotheses is a scientific method
Answer:
Aids in preventing polyspermy.
Explanation:
Polyspermy is a process that involves multiple fertilization of an egg by multiple sperm, which leads to the embryo inheriting multiple centrioles from the parents. Polyspermy is often considered lethal, and there are several mechanisms in most animals that prevents multiple fertilization of eggs. One of such mechanisms is the possession of a micropyle by zebrafisg eggs which limits the chances of multiple fertilization, as only one sperm is able to pass through the micropyle at a time. This micropyle most likely aids in preventing polyspermy.
D.Blood would not be filtered correctly and waste materials wil circulate in the blood instead of being excretes
Transport proteins- an example of a protein in the plasma membrane is integral proteins, which main function is to transport molecules across the membrane. Hope this helps :)
Answer:
a. 200,000 years ago.
Explanation:
Scientists believe that Homo neanderthalensis appeared about 200,000 years ago. The name Homo neanderthalensis was given to them because first evidence of their existence was found in Germany near Neander Tal. Their period of existence is part of the Pleistocene period and they are considered as the immediate ancestors of modern humans (Homo Sapiens).
