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3 years ago

What is the importance of the nitogen cycle

1 answer:

6 0

The nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. Nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and DNA, the building blocks of all life .

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If the xylem in a young tree is damaged, which process is first affected?

ollegr [7]

Absorbing water from the soil

Xylem is transport tissue found in vascular plants. The function xylem is to transport water from the roots to shoots. It is also used to replace the water loss during transpiration and photosynthesis. The xylem sap has water and inorganic ions . The transport of water is done true passive process. Transporting water to the top of the tree becomes difficult that is why xylem is also condsidered to limit the height of trees

5 0

3 years ago

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Which of these is NOT true. Once the Human Genome was completely mapped, scientists found

devlian [24]

Answer: D - Genes move around on the chromosomes and could be located anywhere

Explanation:

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3 years ago

g Indium has two naturally occurring isotopes: 113In with an atomic weight of 112.904 amu, and 115In with an atomic weight of 11

aleksandrvk [35]

Answer:

Fraction-of-occurrences of 115In isotope $= 0.957$

Explanation:

As we know weight of 113 In isotope is equal to the sum of product of fraction-of-occurrences of two constituents isotopes and their atomic weight

$^{115}In_w = f_{113}*A_{113} + f_{115}*A_{115}$ ------(1)

As we know sum of fraction-of-occurrences of two constituents isotopes is equal to one.

$f_{113} + f_{115} = 1\\f_{113} = 1- f_{115}$ ---------(2)

Substituting the given values in equation 1, we get

$^{115}In_w = f_{113}*A_{113} + f_{115}*A_{115}\\114.818 = (1 - f_{115}) * 112.904 + f_{115} * 114.904\\f_{115} = 0.957$

Substituting this value in equation 2 we get -

$f_{113} = 1- f_{115}\\f_{113} = 1- 0.957 \\f_{113} = 0.043$

7 0

3 years ago

A woman has blood Type A, her baby has blood Type AB: Is it possible that a man who has the blood Type A could be the father? Sh

Wittaler [7]

Answer:

No, it is not possible

Explanation:

Humans use the ABO blood group system where the A and B alleles are dominant over allele O but codominant with one another.

This system is such that;

Type A can only have genotype: iAiA or iAi

Type B can only have genotype: iBiB or iBi

Type AB can only have genotype: iAiB

Type O can only have genotype: ii

According to this question, a woman has blood Type A (iAiA or iAi) and her baby has blood Type AB (iAiB). This means that the father definitely contributed the allele B in order to have a baby with type AB. It also means that, according to the question, IT IS NOT POSSIBLE FOR A "Type A" father to produce that baby (see the punnet square attached).

Note: The father must contain an allele B in his genotype i.e. the father must be either type B (iBiB or iBi) or type AB (iAiB)

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2 years ago

Answer the following questions.

natima [27]

Answer:

Gravity?

Explanation:

These are the things needed for life: water, air, food, light, shelter, and space. It doesn't include gravity.

3 0

3 years ago

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