The answer is that they have traits that enabled them to survive in a changing environment.
During the evolution of the Earth, and later during the evolution of life, the environment was not constant. Change in the environment could lead to an extinction of some species. But, some species were able to adapt or could tolerate a wide range of environmental factors. One of the explanation, why unicellular organisms did not evolve into complex multicellular organisms is because they have traits that help them to tolerate the wide range of factors, and thus, survive in changing environment.
I think the answer is A not sure tho ! Might be wrong .
Answer: B. They always have offspring identical to the parent plant.
Small intestine
Nutrients are absorbed into the bloodstream through small finger-like nodules on the wall of the small intestine called villi.
The small intestine is a long hollow tube situated between the stomach and the large intestine. It is the part of the digestive system where the end absorption of food occurs. The small intestine is divided into three distinct regions which are the duodenum, jejunum and ileum. The ileum region contains villi (small finger-like structures) which help to absorb digested food and nutrients such as vitamin B12 and bile acids.
