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zloy xaker [14]
3 years ago
5

When does the cell have to se active transport

Biology
1 answer:
gulaghasi [49]3 years ago
4 0
To move molecules across the membrane against a gradient
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One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3). Carbonic acid is a weak acid that, w
tankabanditka [31]

Answer:

The answer is "Option C".

Explanation:

In the given question, the pH scale is used to evaluate acid or basic (alkalinity) formulas. It is nearly positive throughout the blood. Human blood has to maintain its pH at about 7.4, to prevent dramatically increased or lower changes, even though the bloodstream enters or exits acidic or essential substances.  

  • The buffers are essential for stabilization management. Calcium carbonate produced as carbon dioxide joins the blood system and combines with the liquid is a buffer which adds to the pH level in the human blood.
  • It is returned to the water and distributed as a waste product until it enters the lungs, that's why choice C is correct.
7 0
4 years ago
Which molecule is used to cut out a section of dna
miskamm [114]
The 4 of th dna is the answer
8 0
4 years ago
The shells of a certain species of marine snail are highly variable, with some snail shells being solid colors and others being
raketka [301]
Clearly, there is a variation in these marine snails so 'No variation' is definitely not an answer. Artificial variation is when humans interfere with their genetic engineering that modifies the DNA of the organism. Assuming that this is natural, then this is not the answer. 

Environmental and genetic variation can be easily confused with. Genetic variation is more on the genotype, the composition of the genes that form the physical traits. While environmental variation is more on the phenotype, or the trait that you see and observe. However, there can be genes that are inherited, but due to the influence in environment, they don't show up. So, assuming that these colors are consistent from birth, then the answer would be genetic variation.
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4 years ago
Ribosomes are the most
sdas [7]

Answer:

Explanation:  

The nucleolus makes rRNA, which makes up ribosomes. The Golgi apparatus gets vesicles of proteins from the ER (which contains ribosomes) to process, sort, and ship the proteins to where they are needed. The rough endoplasmic reticulum and the cytoplasm houses the ribosomes.

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3 years ago
What role can fire play in the life cycle of some gymnosperms?
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The heat causes them to open up and flow air

8 0
3 years ago
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