In sexually reproducing animals, once fertilization of the egg takes place, the ___________ exists as a single cell until cell division begins.
D) zygote
The apex (pointed end) points down and to the left. It is 5 inches<span> (12 cm) long, </span>3.5 inches<span> (8-9 cm) wide and </span>2.5 inches<span> (6 cm) from front to back, and is roughly the size of your fist. The average weight of a female human heart is 9 ounces and a male's heart is 10.5 ounces.</span>
<span>When some amphibians mature they live on land because they eat arthropods and they find them on the land. </span>
Extra-abdominal position means that the testes hang outside the abdomen and are not in it. This is important because the sperms in the testes are very susceptible to high temperatures - meaning that they can easily die due to high temperatures like what we have within the abdomen
