<span>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.</span>
Well, when there is earthquakes, the earthquakes move around most of the fossils into other places and other continents and rivers and oceans, so earthquakes move all the fossils.
Provision of energy. Fats are a source of energy in the human diet, together with carbohydrates and proteins, the other two main macronutrients.
Answer:
C - Mutations are the only source of genetic variation for asexual reproduction
Sperm and egg cells do not go through mitosis, they go through meiosis. Why? Well, in mitosis, cells copy themselves. But in sperm and egg cells, they have to duplicate differently. So, there is no such thing as two different sperm or egg cells that are the same.
