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kondor19780726 [428]
2 years ago
11

The cells that perform immunological surveillance are the ________ cells.

Biology
1 answer:
vlabodo [156]2 years ago
6 0

Answer:

The correct answer is "Natural killer".

Explanation:

Natural killer cells, also known as NK cells or large granular lymphocytes, are cells that have an essential role in the innate immune system. Nk cells perform immunological surveillance, and are important for prevent the growth of tumors and develop chancer. Nk cells are able to recognize targets that are only present in cancerous cells, killing them before they start to proliferate.

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In a population of tree frogs, the allele that causes yellow eyes (Y) is dominant over the allele that causes orange eyes (y). I
Alex787 [66]

Allele that causes yellow eyes (Y) is dominant over the allele that causes orange eyes (y)

Y = 85% = 0.85 and

y = 100% - 85% = 15% = 0.15

f(y) = square root of y = √y = √0.15 = 0.387

frequency of the allele that causes orange eyes = 0.387

Once we know the value of y, Y + y = 1

Putting the value of y, we get

Y = 1 – 0.387

<span>Frequency of the dominant allele that causes yellow eyes = 0.61</span>

4 0
2 years ago
Mariyam, a marine biologist, measures the length of a great white shark at 4.5 m long and its teeth at an average of 50 mm long.
Oksana_A [137]
Metres are exactly 100 cm in length, the easiest way to go from metres to centimetres is to simply add the extra 1 or 2 zeros, so 4.5 metres would be 450 centimetres.

As for the millimetres, 1mm is equal to 0.1cm, once again, just move the decimal forward by one numeral, and you'll have the converted value, making 50mm = 5.0cm.

Your shark would be 450cm long and have teeth with an average length of 5cm.
6 0
2 years ago
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In the experiment, you will determine whether having worms in the soil causes lima bean plants to grow more, less, or the same.
Fantom [35]
 determine<span> how the presence of </span>earthworms<span> in </span>soil can<span> affect </span>plant growth<span>. ... tomato, green </span>beans<span> and radish </span>plants<span> in </span>soil<span>samples that contiained </span>earthworms<span>, ... For this </span>experiment<span>, the independent variable is </span>whether<span> or </span>not<span>the </span>earthworms<span> ...

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7 0
2 years ago
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The mountains of the Sierra Nevada play a role in the formation of desert in eastern California and Nevada. What is this an exam
lana66690 [7]
I think that occurrence is an example of  : The lithosphere influences the atmosphere and biosphere

Rains happen when the water within the atmosphere brought out by the win and will eventually fall to the place where it came into

The thing is, These mountains often blocked the water-filled with air, causing it not able to reach the place behind the mountain, which will eventually became a desert
4 0
2 years ago
Which statement describes the semiconservative model of DNA replication correctly? It proposes that the two nucleotide strands u
arsen [322]

Answer: It proposes that the entire double‑stranded DNA molecule serves as a template for a whole new molecule of DNA.

Explanation:

In semi-conservative DNA replication:

- a parent double-stranded DNA splits in two.

- Each strand serves as template, and then read by the enzyme, DNA polymerase, to ensure accurate synthesis of a new daughter strand for both

- the newly synthesized strand contains nucleotides that are complimentary to free nucleotides present in the parent strand.

Thus, because the parent double strand is retained in the newly synthesized DNA, this model is described as semi-conservative

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2 years ago
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