Answer:
B. Primary spermatocytes
Explanation:
The germ cell line is a group of cells found inside the seminiferous tubules. This germ cells undergo mitosis (creating spermatogonia) to have a steady supply of cells that will divide by meiosis to produce gametes. When spermatogonia divide by meiosis at the end of meiosis I the newly created cells are known as primary spermatocytes.
In summer, the amount of green pigment and chlorophyll are much more, in fall, the amount of chlorophyll and green pigment is less. That's the reason the leaves turn colors.
Answer:
The hypothalamus is located on the undersurface of the brain. It lies just below the thalamus and above the pituitary gland, to which it is attached by a stalk. It is an extremely complex part of the brain containing many regions with highly specialised functions.
The process by which gases hold heat in the air. The greenhouse effect is a natural process that keeps Earth's<span> atmosphere at a temperature that is comfortable for</span>most<span> living things. What </span>absorbs most of the energy that is radiated from Earth's surface<span>? water vapor, carbon dioxide, methane, and other gases.</span>
