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Sedaia [141]
2 years ago
13

In order for sharks to maintain a concentration balance with it’s environment, a

Biology
1 answer:
Ksivusya [100]2 years ago
4 0

Answer:

B. retain its urine in it’s blood stream

Explanation:

Sharks are cartilaginous fishes that lives in the ocean. Oceans are always salty, hence organisms need to maintain a salt-water balance between their internal and external environment because of osmosis. Sharks are able to maintain this by ensuring that the amount of solutes in their internal environment is as much as that in their external environment.

Sharks retain a chemical contained in urine called UREA in their bloodstream to counter the osmotic effect of the salt concentration in the waters they live. This helps them maintain a concentration balance with their environment.

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Helen [10]

Answer:

3,5,6,4,1,2

Explanation:

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5.chromosomes form in the first phase of mitosis, prophase

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4 sister chromatids separate during anaphase

1 two new nuclei form during telphase

2 cytokinesis is the separation of cytoplasm , resulting in two daughter cells

8 0
3 years ago
What percentage of human sperm cells carry an X chromosome?
Kobotan [32]
Percentage of human sperm cells carry an X chromosome is C 50%
4 0
2 years ago
Which of the following are needed by all living things?
defon
I’m pretty sure it’s water, oxygen, and food. beacuse food provided both nutrients and an energy source.
4 0
2 years ago
A 47 year-old male presents with chronic back pain and lower left leg radiculitis. A laminectomy is performed on the inferior en
Morgarella [4.7K]

The correct codes are 63267 and 69990.

The codes are given based on the lesion if it is intradural or extradural. In our case here it is extradural cystic structure so that is why it ranges between 63265 to 63268.

We also divide the section of spine depending on where the lesion is being located. Code 63267 describes laminectomy which has evacuation of intraspinal lesion which is found in the lumbar spine.

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7 0
3 years ago
Which changing external condition triggers the salivary glands?
gregori [183]
<span>The correct answer is B. Lack of water. When there's no water and you start to dehydrate, your salivary glands start working extra hard because your mouth can't be dry and the salivary glands produce saliva to keep the mouth and the throat dry. If your throat and mouth are dry you can't even swallow.</span>
8 0
3 years ago
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