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3 years ago

Bacteria from the soil absorb nitrogen from the air and convert it into ammonium. This is an example of _____.

2 answers:

6 0

Bacteria from the soil absorb nitrogen from the air and convert it into ammonium. This is an example of nitrogen fixation  .

True [87]3 years ago

5 0

Nitrogen fixation

This process creates organic compounds, including ammonium, that contribute to the growth of a plant in much the way fertilizer does. Many plants have evolved to facilitate nitrogen fixing bacteria in their roots as to promote production of these organic compounds when the soil quality is poor or lacking in these bacteria.

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Ellis-van Creveld syndrome is a rare homozygous recessive disorder that affects bone growth. Individuals with this disorder are

Anna11 [10]

Answer:

1. 2.8%

2. 97.1%

Explanation:

If the birth rate of this disorder is 1 in every 5000 births it means that the frequency of the recessive homozygous genotype is 1/5000=0.0002

If we name the gene for the disorder with A, than the genotypes are aa (homozugous recessive), Aa (heterozygous, carrier), AA (dominant homozygous).

According to the Hardy-Weinberg equation:

frequency of AA is p2 (P)

frequency of Aa is 2pq

frequency of aa is q2 (Q) and

p2+2pq+q2=1 (P+Q=1)

Q=0.0002 P=1-0.0002=0.9998

q= $\sqrt$ 0.0002=0.014

p= $\sqrt$ 0.9998=0.999

2pq=0.028=2.8%

2. According to the Hardy-Weinberg equation:

frequency of AA is p2 (P)

frequency of Aa is 2pq

frequency of aa is q2 (Q) and

p2+2pq+q2=1 (P+Q=1)

The frequency of the recessive homozygous genotype (Q) is 1/5000=0.0002

Q=0.0002

q2=0.0002 2pq=0.028 p2=?

p2= 1-0.0002-0.028 =0.9718=97.1%

6 0

3 years ago

Analyze the pedigree shown. The trait in the pedigree above is (blank) and (blank)

KiRa [710]

Answer:

sex-linked- recessive

Explanation:

Sex linked recessive are those traits which are expressed even if one copy of the defective allele are present. They are passed from parents to offspring through X or Y chromosomes.

These disorders are more prevalent in men than women because women have two X chromosomes while men have only one. Females can also get X-linked disorder but they are very rare because female needs two copies of defective gene to develop disorder while men need only one.

For example: As you can see in the example image the gene is passed in daughters too but mostly they are carriers but men develop disease because they have only defective X chromosome that contain defective gene and no counter part to lower its effects.

One of the common x linked disease is hemophilia. You can see the pedigree of Hemophilia that men are getting more effected than women.

Hope it help!

5 0

3 years ago

Read 2 more answers

Raido waves are a part of the electromagnetic spectrum with high wave lengths and low frequencies

cluponka [151]

The however is True.

The correct answer would be True

4 0

4 years ago

Read 2 more answers

Which of the following best describes Mendel's idea of segregation?

Mekhanik [1.2K]

Answer:

Explanation:

Since we know about mitosis and sexual reproduction, each parent passes on only one copy of the gene because they got a copy of a gene from each of their parent before, and the new child will end up with two genes, one from each parent.

5 0

3 years ago

Explain why the tongue can be considered the muscle with the greatest strength endurance.

Soloha48 [4]

It is always working.

It even works while the person is sleeping to push saliva down the throat.

8 0

4 years ago

Read 2 more answers