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Feliz [49]
3 years ago
13

Two questions...

Biology
1 answer:
Veseljchak [2.6K]3 years ago
8 0

Nitrate is the form of nitrogen most used by plants for growth and development. Nitrate is the form that can most easily be lost to groundwater.

Plants and animals could not live without nitrogen. It is an important part of many cells and processes such as amino acids, proteins, and even our DNA. It is also needed to make chlorophyll in plants, which plants use in photosynthesis to make their food and energy.


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What’s the answer to this problem?
insens350 [35]
It is the third option!
3 0
4 years ago
Read 2 more answers
A 57-year-old man is evaluated in the clinic for a routine physical exam. He is followed for hypertension and hyperlipidemia. He
andrew-mc [135]

Answer:

d. Measure thyroid-stimulating hormone level

Explanation:

The most suitable next step in management of this patient is to measure a thyroid stimulating hormone, or thyrotropin level.

This patient's apparent treatment refractory dyslipidemia is most likely contributed by undiagnosed thyroid disease. Despite sticking to the treatment with atorvastatin, his  LDL AND total cholesterol are raised.

Additionally, there are some clinical signals that give an idea about the diagnosis of hypothyroidism especially  fatigue and constipation.

Hypothyroidism is concerned with and is a very common secondary cause of dyslipidemia and thyrotropin level measures are indicated.

Hyperlipidemia may show better results to thyroid stimulating hormone.

Hence option D is the right answer.

8 0
3 years ago
HELP!! DNA was isolated from water samples taken from six different sites. This gel
VladimirAG [237]

After running DNA in a gel, bands of different sizes and species might appear. <em>Scientists know silver carp are at North Shore site 1 because one of the bands in lane 1 matches a band in the positive control (Option C). </em>

<h2>Gel</h2>

When DNA was isolated and run in a gel, many bands migrated to different points.

These bands were the different-sized fragments of DNA samples from different species from the six sites.

<em>Researchers wanted to figure out where the silver carp is. </em>

To do it, they needed to identify the bands on the gel that belonged  to the silver carp DNA, so they included negative and positive controls to make comparisons.

<h3>Positive and negative Controls</h3>

Negative and positive controls guarantee the interpretations of the results.

  • The positive control shows the band sizes that belong to the silver carp DNA.

<em>Any</em><em> band</em><em> in the sampling sites that</em><em> matches</em><em> one of the </em><em>positive control</em><em> bands indicates that the species is present at that site.</em>

  • The negative control is the opposite. It is the absence of the species' DNA.

<h3>Results interpretation</h3>

As we can see, there are four sites where the bands match one of the bands of the positive control. These are,

  1. North shore site 1
  2. Chicago site 1
  3. Calumet site 1
  4. Calumet site 2

This means that at these four sites, the silver carp is present.

<em>So scientists know silver carp are at North Shore site 1 because one of the</em><em> bands</em><em> in </em><em>lane 1</em><em> matches a band in the </em><em>positive control</em><em> (Option C). </em>

By looking at the lane of the North Shore site 1, we can also see another band (Thinner and grey). But this band does not match either of the positive control bands. This result suggests that the grey band belongs to another species' DNA.

You can learn more about gel electrophoresis at

brainly.com/question/9437877

brainly.com/question/895793

4 0
3 years ago
Describe skin cells and their function
Flauer [41]
Skin serves as a protective barrier, a way to sense the world, and a layer that keeps nutrients and water inside the body. Four types of cells make up the skin, and they are produced mainly in the epidermis near the basement membrane.
3 0
3 years ago
Hello, please help, see attached photo :) thanks
Dmitry [639]

Answer:

a. Parents AA x Aa

b.

                     A               A

A                   AA             AA

a                   Aa              Aa

c. 50%

Explanation:

a. Parents AA x Aa

b.

                     A               A

A                   AA             AA

a                   Aa              Aa

c. 50%

5 0
2 years ago
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