I am like 100% that the answer is A.
Answer:
If contain, the colorant stays, if not, it washes.
Explanation:
The ELISA inmmunoassay experiment consists on adding to an antibody a sample with a colorant, if the sample contains an antigen, it will stick to its proper antibody and te colorant will remain. If not, when the laboratory worker washes the sample after adding the sample, the colorant and the sample will be gone because there wasn´t an antigen on the sample that fitthe antibody. In that case, the result will be negative.
I’m sure the answer is early ancestor.
<span>Food
chains and webs not only describe the order in which organisms are eaten, but
they also describe the animals that are all related. To exist with one another,
organisms belonging to a same species either compete for the resources or
divide it amongst themselves, where animals and plants of the same species
co-exist and creates a beauty with nature.</span>
