Which of the following statements is true?

Biology

1 answer:

fiasKO [112]3 years ago

3 0

<u>Answer:</u> Mutations are the most fundamental way to add new genes to a gene pool.

<u>Explanation:</u>

Mutation refers to the process through which the normal sequence of altered. It may be either acquired or hereditary. It leads to addition of new genes to a gene pool.

The reason for not considering other statements as true are:

1. It is the hereditary mutation that are passed form parent to offspring's and acquired mutation is caused by external factors.

2. Acquired mutation are caused by external factors such as radiation.

3. Germ line mutation are important to evolution because they can be inherited.

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Which statement correctly compares nucleic acids and carbohydrates?

givi [52]

Answer:

The correct answer is They both contain carbon ,but only nucleic acid contain phosphorous

Explanation:

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On the other hand nucleic are composed of nucleotides that contain nitrogen base,ribose sugar and phosphate group.

The presence of phosphate group in the nucleic acid make it different from carbohydrate.

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Tall plants are dominant over short plants. One parent is homozygous dominant and the other is heterozygous for plant height.

Greeley [361]

Answer:

a. all tall

Explanation:

If genotypically one of the parents is homozygous dominant and another one is heterozygous for plant height then phenotypically all their progeny will be tall.

Let us suppose, 'T' represents dominant allele and 't' represents recessive allele. Then the genotype of one parent who is homozygous dominant will be TT and genotype of another parent who is heterozygous will be Tt.

The cross is depicted in the attachment.

Here it may also be noted that genotypically two of the progeny will be homozygous dominant while two of the progeny will be heterozygous but phenotypically all the progeny will be 'tall'.