From the given choices above, the portion that is not readily penetrated by the sunlight is the river's or the stream's mouth. The plant life usually are on the surface of the water. The middle portion is occupied by the fish and other aquatic lives.
Answer: it would be b. a biologist studying insects.
Natural selection is right
Answer: A
Explanation: It travels through tubes called ureters
I think your answer is c. Correct me if I am wrong, but I simply subtracted 2081 minus 1997, and got 84 years.
