Answer:
D) Must be reproduced in living cells
<span>In the digestive process, the pepsinogen excreted by the walls of the stomach forms the necessary enzyme pepsin when it mixes with hydrochloride acid in the stomach's gastric juices. Pepsin is crucial in breaking down proteins.</span>
Answer:
Vaccination involves showing the immune system something which looks very similar to a particular virus or bacteria, which helps the immune system be stronger when it is fighting against the real infection.
Explanation: "it is what it is".
In the sporophyte phase a diploid (having two sets of chromosomes) plant body grows and eventually produces spores through meiosis. These spores divide mitotically to produce haploid (having a single set of chromosomes) gamete-producing bodies called gametophytes. ... The sporophytes of all conifers are trees or shrubs.