Since a secondary source is a source written after an event has occurred, I want to say that the answer is A. Hope this helped!<span />
Answer:
Innate immunity
Explanation:
Innate immunity is also referred to as inherited or natural immunity. It is the type of immunity that one is born with. It is passed on from mother to offspring. This form of immunity is non-specific as it offers protection from many types of antigens.
Answer:
up-regulation
Explanation:
Upregulation is where a increases the quantity of a cellular component like protein or RNA in response to an external stimulus.By controlling the number of its receptors, cells may increase and decrease their cell sensitivity.... Hormones can also trigger cells to control themselves by upregulation.( Estrogen is the primary sex hormone for females).
Meiosis takes place in the gonads of most organisms.
So the correct answer is A : Gonads.
Hope this helps :)
~Davinia.
It is the climate of a high land
