Answer: The oxygen content at the source of the streams or rivers is higher as compared to the mouth of the river. Consequently, the organisms which require more oxygen tend to find at the source of the rivers whereas the organisms which require less oxygen tend to find at the mouth of the river.
Explanation:
For an atom to become a positively charged ion it must lose negatively charged electrons.
Answer:
A story that might be a good human interest story would be the vaccines for corona. Everyone these days are waiting desperately for corona to end. Talking about a vaccine might give them hope, and it would be nice to see how the scientist and doctors truly care for the people. Maybe encourage them to wear the masks until the vaccines come out?
Answer:
it ensures the transmission of traits from one generation to the next.at thesame time,it is a key process that introduces genetic variation into the traits that offsprings inherent from their parents.
