CameronVand21
29.06.2019 •
Biology
What would happen to the amount of oxygen in earth’s atmosphere if half the trees on earth were cut down? why?
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Ответ:
the ammount of oxygen in earths atmosphere would decrease a lot because trees absorb carbon dioxide from the atmosphere and release oxygen using the process of photosynthesis. Trees produce roughly one third of the oxygen in our atmosphere.
Ответ:
The correct answer is- A: allopatric speciation.
Allopatric speciation can be described as formation of new species due to geographical isolation of a population.
Darwin studied various species of finches on isolated galapagos islands.
They developed different adaptations (in the form of different beak shapes) due to different food availablilty.
Thus, in due course of time, different species evolved from common ancestor. This represented allopatric speciation.
Thus, option A) is the right answer.