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Slav-nsk [51]
3 years ago
15

The fossil presence of anatomically modern humans in ________ demonstrates that our ancestors were capable of substantial water

crossings by 40,000 years ago.
Biology
1 answer:
Vsevolod [243]3 years ago
3 0

Answer:

The correct answer is - Africa.

Explanation:

Scientists found the fossils of modern humans called Mota an ancient man who lived around 40000 to 45000 years ago in Ethiopia. It was the first DNA isolated from Africa.

This DNA sample says that the Europeans have 6% of the DNA of this modern human, which suggests that there was substantial migration of people into Africa from Europe and the middle east by water crossings.

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What is vector in life sience​
ivolga24 [154]

Answer: Traditionally in medicine, a vector is an organism that does not cause disease itself but which spreads infection by conveying pathogens from one host to another. Species of mosquito, for example, serve as vectors for the deadly disease Malaria. A vector is a living organism that transmits an infectious agent from an infected animal to a human or another animal. Vectors are frequently arthropods, such as mosquitoes, ticks, flies, fleas and lice. brainliest

Explanation:

6 0
3 years ago
Which of the following statements is not part of the cell theory? A) All living cells come frondivision of preexisting cells. B)
zzz [600]
B is not part of the cell theory; there are many types of cells that do not have cell walls, so the statement cannot even be generally true.
4 0
3 years ago
13. Molecular clocks based on mitochondrial DNA comparisons are best
Andru [333]

Answer:

c

Explanation:

hope this helps

6 0
3 years ago
A woman with severe discoloration of her tooth enamel has four children with a man who has normal tooth enamel. Two of the child
n200080 [17]

Answer:

Mother (with severe discoloration of tooth enamel) --> bob and Gladys.

From bob --> 4 daughters.

From Gladys --> 2 boys and 1 girl.

Explanation:

Mother with severe discoloration of tooth enamel transferred this trait to her offspring i. e. bob and Gladys. From bob, this trait is transferred to his 4 daughters while Gladys has 2 boys and 1 girl has this type of tooth enamel. This discoloration of tooth enamel comes from the women to their children and this characteristics is transferred from one generation to another generation.

3 0
3 years ago
Does anyone know how to answer these questions? PLEASE I NEED HELP ASAP. This is for biology.
kvasek [131]

Answer:

Answer No 3: Recent studies and researches have shown that the muscle cells do not actually wear and tear during heavy exercises. What happens is that micro tears are formed in the muscle fibers as a result of heavy exercise. These micro tears  cause the muscle cells to rebuild themselves.

Answer No 4: One of the biggest reasons that the insertions done by CRISPR-Cas9 insertion would not pass to future generations is because the specialized cells are being modified in this system. As the specialized cells do not have the tendency to for all cells of the body hence, the insertion made by CRISPR-Cas9 will most likely not be transferred to the future generation.

6 0
3 years ago
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