They are in the sand in the sea.
Let me know if i am right.
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:)
Your answer would be B. individuals moving into a population.
Imagine you live in a small village that is remote and hasn't had much contact with people from different geographical areas or other continents even. Your community will have a certain gene pool as each individual has certain genes and when the genes of every person are taken into account this leaves us with certain genes that perhaps aren't found somewhere else. Suddenly, there is a big influx of another group of people coming from one particular region with a somewhat different gene pool to this community.
After some time, these people will reproduce and create new children who will have a more diverse gene pool (if the people from the old and new community would make babies for example). This is how the gene pools would get expanded and also gene flow would occur.
I think the thalamus is the gateway to the cerebral cortex. Thalamus is a small structure within the brain located just above the brain stem between the cerebral cortex and the mid brain and has extensive nerve connections to both. Its main function is to relay motor and sensory signals to the cerebral cortex. A sensory impulse travels from the body surface towards the thalamus, which receives it as a sensation, which is then passed onto the cerebral cortex for interpretation as touch, pain or temperature.
Answer:
B and D
Explanation:
Schleiden and Schwann proved that plants and animals have cells like humans do proving that every living thing has cells.