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3 years ago

HELP PLEASE Current theory is that all life on earth originated from

Biology

2 answers:

mezya [45]3 years ago

6 0

Answer:

single cell prokaryotes

skelet666 [1.2K]3 years ago

6 0

Answer:

Single-cell prokaryotes

Explanation:

The first cells were most likely very simple prokaryotic forms. Ra- diometric dating indicates that the earth is 4 to 5 billion years old and that prokaryotes may have arisen more than 3.5 billion years ago

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4 years ago

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Pretend you are a lung. The behavior of your body has not been very healthy and as a result you are sick. Write a plea to your b

Neko [114]

I am an important respiratory organ that is located near the back bone on either side of the heart. My main function is to transport oxygen form the atmosphere into the bloodstream and also release the carbon dioxide produced within the body out in the atmosphere.

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4 years ago

Suppose two BbCc mice are crossed together. Assuming that the two genes assort independently, what are the expected phenotypes,

Katyanochek1 [597]

Answer:

4 types of phenotypes with phenotypic ratio 9:3:3:1 will be obtained.

Explanation:

The Punnett square diagram for the cross between mice with genotype BbCc & BbCc is attached.

It is clear from the diagram attached that the phenotypic ratio will be 9:3:3:1

The following 9 genotypes will show dominant trait for both the characters i.e. characters represented by B & C genes.

BBCC, BBCc, BbCC, BbCc, BBCc, BbCc, BbCC, BbCc, BbCc

The following 3 genotypes will show dominant trait for one character represented by gene B and recessive trait for other character represented by gene C.

BBcc, Bbcc, Bbcc

The following 3 genotypes will show recessive trait for one character represented by gene B and dominant trait for other character represented by gene C.

bbCC, bbCc, bbCc

The following genotype is the only genotype which will show recessive trait for both the characters represented by gene B & C.

bbcc

6 0

3 years ago