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nalin [4]
3 years ago
11

You have created a small-scale ecosystem in your laboratory that exactly mimics the nitrogen cycle in nature. You accidentally r

elease a virus into your laboratory that inserts itself into (and inactivates) the gene for nitrogenase. What would you expect to happen in your ecosystem?
Biology
1 answer:
disa [49]3 years ago
5 0

Answer:

The correct answer will be- the amount of ammonia will decrease in lithosphere and the amount of nitrogen in atmosphere will increase.

Explanation:

Nitrogen is the most abundant element present in the atmosphere as it constitutes 78% of the atmospheric gases.

The major cause of nitrogen fixation on Earth is biological nitrogen fixation which takes place due to the ability of prokaryotes to utilize atmospheric nitrogen as they possess an enzyme called nitrogenase. The nitrogenase converts the atmospheric nitrogen to a usable form that is ammonia (NH₃).  

In the given condition, if virus inactivates the nitrogenase enzyme, then atmospheric nitrogen will not be converted to ammonia as a result of which the Amount of ammonia of soil decreases in the soil and the atmospheric nitrogen will increase.

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n garden peas, the allele for tall plants is dominant over the allele for short plants. Suppose that a true-breeding tall plant
muminat

Answer:

25% of the heterozygous cross are short, and the offspring of a homozygous dominant and homozygous recessive pea plant will always display the dominant trait (phenotype), because they are heterozygous.

Explanation:

In this explanation, I'm assuming that the allele "T" for tall plants is dominant to the allele "t" for short plants, like in Gregor Mendel's pea plant experiment.

A homozygous tall pea plant will have the genotype "TT" and a homozygous short plant will have the genotype "tt" because homozygous means that both alleles are identical. Since "T" is dominant over "t", any plant with at least one "T" allele will be tall (the dominant trait), regardless of what the other allele is. Let's look at a Punnett square for this cross:

Explanation:

3 0
4 years ago
Which of the following statements about DNA is FALSE?
Gwar [14]

Answer:

A) The two strands of a DNA molecule are parallel and complementary.

Explanation:

DNA is a polymer of nucleotide and this nucleotide are made up of a deoxyribose sugar molecule, a nitrogenous base, and a phosphate group. In DNA genetic information of the cell is stored in the form of nitrogenous bases.

DNA is double-stranded and both the strands run anti-parallel with each other.  This anti-parallel orientation provides the nitrogenous base of one strand to form hydrogen bonds with the nitrogenous base present on the opposite strand.

In DNA adenine base pairs with thymine with two hydrogen bonds and guanine base pairs with cytosine with three hydrogen bonds. So the false statement is A.

3 0
3 years ago
Analyze the graph with a partner. How many mass extinctions did you identify? How did you determine when they occurred?
Scilla [17]

Answer:

4 mass extinctions

Explanation:

as there are huge drops in the graphs

at 440,390,260,50

Mark me as brainliest pls

6 0
3 years ago
What is the main physical difference between two photosystems
kkurt [141]
<span>PS I produces NADPH and PS II produces ATP. In the thylakoid membrane is that what you were asking?

</span>
5 0
3 years ago
The canal connecting the third and fourth ventricles and running through the midbrain is the interventricular foramen.
jeyben [28]

Answer:

The answer is false. The correct answer is cerebral aqueduct.

Explanation:

Because the foramen is the area that connects the third ventricle of the brain to the two lateral ventricles.

The canal connecting the third and fourth ventricles is called cerebral aqueduct.

4 0
3 years ago
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