Species evolve independently possibly due to geographical isolations or behavioural isolations.
Geographical isolation includes the isolation of 2 groups of the same species. Since these 2 groups live in different locations, (e.g. a volcanic eruption resulting in a barrier between one side of an ocean and another side of the ocean), they will have different selection pressures in their different environments as well (e.g. one side of the ocean may have more sunlight and thus more underwater plantations than the other side of the ocean). Natural selection will eliminate those with disadvantageous characteristics (e.g. Fishes that only eat plants and nothing else on the side of the ocean with little plantations) with unfavourable alleles, and select for those with advantageous characteristics (e.g. Fishes are able to eat plants and other organic substances as well on the side of the ocean with little plantations) with favourable alleles.
Since the 2 groups have different selection pressures, natural selection will occur in different ways, selecting for and against different types of fishes with different types of alleles. Also, because of the barrier, they are not able to mate with each other, and there are no mixing of genes from one side of the ocean and the other side. They are genetically isolated. As genetic drift occurs over time, their gene pools become different from each other. Thus, they evolve independently.
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Answer:
a
Explanation:
a just trust me on this one
Mucous cells is what I think is the answer. hope it helps ;)
Answer:
•Both Oxygen and Carbon Dioxide are gases found in Earth’s atmosphere
•Both are essential to life as we know it
•These gases cycle from plants to animals and back again
Explanation:
It's the amalyse that digested the food or starch in out mouth. Amalyse is an enzyme that is responsible to break down the starch in to sugar. Usually, it is present in our saliva, this is where the digestion started then next to our stomach.
