Answer:
you didn't post a picture of the question
The mammalian sperm cell consists of a head, a midpiece and a tail. The head contains the nucleus with densely coiled chromatin fibres, surrounded anteriorly by an acrosome, which contains enzymes used for penetrating the female egg.
Adaptations generally occur in order to increase the fitness and thus survival of organisms. ... shown that may not be sufficient to accurately predict the effects of climate change on a species.
The right atrium. The left atrium. right ventricle and the left ventricle