D is the answer because it does not include an egg stage as i know it dose not it does not include an egg stage and plz i need some points i just joined few min ago
Answer:
C. a decrease in the chromosome number in every generation.
Explanation:
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Answer:
Thymosin
Explanation:
Thymosin is the term used to refer to a set of thymus polypeptide hormones that influence the maturation of T lymphocytes intended to play an active role in cell mediated immunity. Thymosin may serve as an immunotransmitter by modulating the hypothalamic-pituitary-adrenal and gonadal axes. It also helps to counteract the harmful effects of cortisol.
Although amphibious frogs live on land and in water, they must lay their eggs in water or the eggs will dry up, effectively killing the offspring inside. Frog eggs are covered with a glycoprotein, which helps keep the eggs moist. This glycoprotein has to keep in contact with a source of moisture, such as water.
Wind, because the others can be completely used up at some point whereas wind will theoretically always be blowing
