The correct choice is D.
A karyotype is the layout of chromosomes, in size order from largest to smallest. These chromosomes are ALWAYS in pairs, meaning that it would be easy to notice which of the 23 chromosome pairs have 3 chromosomes instead of the usual pair.
The answer for the food chain would be answer B.
1) The antibodies destroy the antigen (pathogen) which is then swallowed and digested by macrophages.
2) White blood cells can produce antitoxins which destroy the toxins that are otherwise known as poison.
<span>Species with a high capacity for population growth like bacteria, for example,
</span><span>tend to be small because they don't wast time and their energy into growth, but rather in reproduction. They start reproducing sonly after they are born.
On the other hand, bigger species like us humans, have time to grow larger, mature in a complex organism and spend less energy and time in reproducing a lot.</span>
<span />
Answer: No
We get many crops from soil. If we do not get enough crops, we will run out of food and may die. The answer is no.
Hope this helps you!