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.
D). Carcinogens are chemical factors in an organism's environment that can cause spontaneous mutation.
Gamma rays because microwaves, visible light and radio waves wouldn’t come in handy if an astronomer would want to study the composition of planets and stars.
Second option/ the gametes produced by meiosis allow for closing organisms
I can't answer 1 but 2=First, make sure you weather proof the house, than go from there and try anything you think is necessary in this situation.
