What must be true about the population in order for evolution by natural selection to take place? The population must have a large number of individuals that can reproduce and produce fertile offspring.

The population must have genetic variation that leads to differential survival and reproduction.

The population must have strong individuals capable of fighting off other populations when threatened.

The population must have well camouflaged individuals to avoid being eaten by predators.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.