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3 years ago

The remains of archaic Homo sapiens have been found in each of the following parts of the world except:

Biology

1 answer:

aksik [14]3 years ago

3 0

Answer:

Option E, North America (modern Canada, U.S.A., and Mexico)

Explanation:

Considering the history, Homosapiens fossils were found in Africa in three geological ages –

a) 300000 to 200000 years ago – H. sapiens were found in North and East Africa

b) 130,000 to 100,000 years ago - Levantine and East African

c) 35,000 to 10,000 years old - Upper Paleolithic and geologically younger individuals

Some 50,000 to 40,000 years ago, Upper Paleolithic in Europe were found. Homo eructus remains were found in Beijing (China) some 400,000 years ago.

There is no as such historical instance associated with North America. Hence, option e is correct.

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dedylja [7]

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3 years ago

Color blindness is a recessive x-linked trait in humans. in a family where the mother is color-blind and the father is normal, t

melisa1 [442]

Color blindness is a recessive x-linked trait in humans. In a family where the mother is color-blind, and the father is normal, the probability of their having a color-blind son is 100%.

Color blindness is a recessive x chromosome liked recessive disease which is more prone in males than in females. As the mother is color-blind she has both the alleles of colorblindness while the father is normal with both x chromosome and y chromosome normal.

So if the parents have a boy, he will always receive an x chromosome with colorblindness gene from the mother and a normal y chromosome from the father always. Thus, the probability of having a colorblind boy will be 100%.

To know more about colorblindness refer to the link below

brainly.com/question/2094919

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1 year ago

Curare is a poisonous plant extract. Curare molecules have a chemical structure like the neurotransmitter ACh. Curare can bind t

gayaneshka [121]

Answer:Curare molecules have a chemical structure like the neurotransmitter ACh. Curare can bind to the ACh receptor site on the chemically gated ion channels in the motor end plate. Even though curare will bind to the receptor site it will not open the ion channel and no ions will pass through. hope this helps ! :)

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3 years ago