<span>Spermatozoa are the mature male gametes in many sexually reproducing organisms. Thus, spermatogenesis is the male version of gametogenesis, of which the female equivalent is oogenesis. In mammals it occurs in the seminiferous tubules of the male testes in a stepwise fashion.</span>
Answer:
The shoot of a grass seedling is enclosed in a sheath called the coleoptile, which grows straight upward if kept in the dark or illuminated uniformly from all sides. If it is illuminated from one side, it will curve toward the light as a result of differential growth of cells on opposite sides of the coleoptile.
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Carbon Cycle<span>: Respiration. The </span>carbon cycle<span> can be broken into two smaller subcycles: respiration and photosynthesis. ... In the respiration </span>cycle<span>, fauna, or animal life inhabiting the biosphere, consume carbohydrates (in the form of plant life) and oxygen and output </span>carbon<span> dioxide, </span>water<span> and energy.</span>
Answer:
D. the larva sheds its skin several times
Explanation:
At the end of the larval stage the insect will make a hard shell and inside it will become a pupa. At this stage the larva will stop eating and moving. The pupa appears lifeless, but one of Nature's most amazing transformations is happening.
