Answer:
Positive natural selection.
Explanation:
The positive natural selection is a type of natural selection that increases the frequency of an allele or trait when it is advantageous for the population. What happened in the example is that the mouth with the slight change in morphology (trait) was more advantageous for the population in the south in relation to the ancestral morphology (still preserved in the population in the north), and therefore its frequency increased. This, in turn, is due to the fact that the food (prey) is not the same in the two habitats (north and south). The specific prey in the south, caused the new morphology to be selected, (increasing the frequency of individuals with the new mouth), becasue probably that trait allows the trouts in the south to hunt more effectively.
They form a complex called chromatin
Answer:
trees are bigger than most plants but they are still plants. they are producers.
for example trees are producers and provide for termites that are primary consumers. spiders are secondary consumers and so on and the food chain goes on.
We rely on Meiosis so that we can produce/have genetic diversity. It also enables us to have proper conditions for reproductive success.
