Answer:
They are arranged in two layers called a phospholipid bilayer; with a hydrophobic, interior and a hydrophilic, exterior.
It's b, population total versus number of organisms per unit of area.
Answer:
The correct answer is c. redundant organs present in an organism, which have been functional in the organism’s ancestors.
Vestigial organ are those which are retained in the evolution however lost their original functions due to change living habits or surroundings of the organisms.
They serve as the evidence of evolution and help in evolutionary studies.
For example, vermiform appendix, nictating membrane of eye, ear muscle etc are vestigial organs found in humans.
