Answer:
The correct option is A.
Convergent evolution is one of the defined type of evolution and it is shown by the species belonging to different ancestors show similar characteristics due to the same residing environmental condition.
Explanation:
The creation of analogous structure takes place in the process of convergent evolution. This is illustrated by the occurrence of similar structure in two different species which were not observed in their respective ancestor. This is due to the residence of the associated species in the same environmental condition and facing the same problems of livelihood. One of the most common example is the flying ability of the insects, bats and birds.
Answer:E. Down-regulation
Explanation:Cells typically up or down regulate depending on the concentration of a hormone levels. When there is a excessive concentration of a hormone in the blood stream, the cell decreases the number of receptors reducing the interaction with that hormone, Also, when there is excessive hormone reduction, the target cells activate to increase their number of receptors.
Down regulation occurs by the the deactivating or degrading of target cells to reduce the number of receptors due to their sensitivity to a particular excess hormone.
Answer:
(D) liter
Explanation:
It is the SI unit of measuring volume.
liter is the unit capacity, formerly defined as the one kilogram of water.it is used to measure volume and is equal to 1000 cubic centimeters or 1 cubic one decimeter.