BIOLOGY HIGH SCHOOL

What are three terms used to describe organisms such as trees

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Answer 1
Answer: Grass, plants, flowers, trees, stumps, that kind of thing or not?

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The roots of the aquatic plant hydrilla are poorly developed and lack xylem tissue. Which is an appropriate justification for this? 1.As hydrilla is aquatic in nature, the roots do not have to search for oxygen, and there is no need for xylem to absorb oxygen because the plant is surrounded by water that has dissolved oxygen in it. 2.As hydrilla is aquatic in nature, the roots do not have to search for minerals,and there is no need for xylem to absorb nutrients because the plant is surrounded by water that has dissolved nutrients in it
3.As hydrilla is aquatic in nature, the roots do not have to search for water, and there is no need for xylem to absorb water because the plant is surrounded by water.

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The appropriate justification of this is that B. As hydrilla is aquatic in nature, the roots do not have to search for minerals, and there is no need for xylem to absorb nutrients because the plant is surrounded by water that has dissolved nutrients in it. 

Answer:

B

Explanation:

An allergic reaction to certain types of natural, unprocessed foods, such as peanuts, is caused by

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If you have an allergic reaction, it means your body cannot handle what you give to it. Say flowers (common) make you sneeze and itch, (like my sister) it is because there's something inside whatever makes you allergic is not good for your body, or your body is not used to it. Can I get a thank you and a rating?

*Hope it helps!!*

Diatoms have cell walls composed of _____.a. silicon dioxide
b. carbon dioxide
c. chitin

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The correct answer is a - silicon dioxide.

Diatoms are single celled algae. They have a silica - based cell wall called a frustule, which gives each diatom a particular shape.

Diatoms exist as separate single cells although some may be found in groups or colonies. The ones found in colonies create very pretty forms: leaf shaped, oval , star and even like a period.

Outer shells of diatoms are quite valuable. They are used in industry in the manufacture of toothpaste to give it grit.

Answer:

Diatoms have cell walls composed of silicon dioxide.

32P can be used to make any nucleotide (A, C, G, or T) radioactive. Which of the following explains why this is true?

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The answer is: All nucleotides have a phosphorus atom that can be replaced with 32P.

DNA building blocks are nucleotides. Nucleotides contain a nitrogenous base, a five-carbon sugar, and, at least, one phosphate group. Exactly that phosphate group in the nucleotide has the phosphorus atom. Therefore, the phosphorus atom in the nucleotide can be replaced with radioactive phosphorus-32 (32P). This replacement has a wide use in labeling nucleic acids and thereby visualizing the target molecule.

The answer is: All nucleotides have a phosphorus atom that can be replaced with 32P.


DNA building blocks are nucleotides. Nucleotides contain a nitrogenous base, a five-carbon sugar, and, at least, one phosphate group. Exactly that phosphate group in the nucleotide has the phosphorus atom. Therefore, the phosphorus atom in the nucleotide can be replaced with radioactive phosphorus-32 (32P). This replacement has a wide use in labeling nucleic acids and thereby visualizing the target molecule.

What is a nucleic acid? Explain your answer.

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Nucleic acids are the main information-carrying molecules of the cell
Nucleic acids are the main information-carrying molecules of the cell, and, by directing the process of protein synthesis, they determine the inherited characteristics of every living thing.

The cell membrane of a red blood cell will allow water, oxygen, carbon dioxide, and glucose to pass through. Since other substances are blocked from coming in, this membrane is called A. perforated. B. semi-permeable. C. non-conductive. D. permeable.

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Answer:

The correct answer would be B. semi-permeable.

Plasma membrane of any cell including red blood cell is semi-permeable in nature as it is made up of lipid bilayer.

It permits the passage of certain substances across the membrane while it blocks other substances.

Gases, small uncharged or non-polar substances such as oxygen, carbon dioxide, et cetera can easily pass through the cell membrane of a cell.

Large or charged molecules such as proteins, sodium ions, potassium ions et cetera can not pass through the cell membrane. They require carrier proteins to pass through the membrane.
Because only certain things are allowed to pass through, this would be considered semi-permeable. B.
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