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atroni [7]
3 years ago
12

This structure provides support and protection for plant cells

Biology
2 answers:
KonstantinChe [14]3 years ago
6 0
Cell wall.......... Hope it helps, Have a nice day :)
Bingel [31]3 years ago
5 0

Answer: the answer is cell wall

Explanation:

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bezimeni [28]

The correct answer is - They supply the energy needed for living processes.

Both the carbon and the nitrogen, are gases that are crucial for the survival of the organisms on the planet. They are mostly used by the producers in the ecosystems, as they need them to manage to perform their cycles, get nutrition, and of course energy. The producers are the basis of the ecosystems, so if they do not have a healthy supply of carbon and nitrogen, the ecosystems on the whole planet will collapse. The carbon and the nitrogen later go from one organism to another as the energy is transferred, and usually end up back into the atmosphere again.

4 0
3 years ago
What is meant by "antiparallel" strands of DNA?
nataly862011 [7]

Answer:

DNA double strands are run in opposite direction  

Explanation:

The DNA is a macromolecule and is made of the polynucleotide. In a DNA, Polynucleotides are arranged in two strands or helices. The two strands are joined together by hydrogen bonds. Each stand has two ends. One end is called 5’ (5 prime) and the end is known as 3' (3 prime). The two stands in a DNA run in antiparallel or in an opposite direction. It means at one end, one strand is 3' and the other is 5' and at the other end one strand is 5' and another strand is 3'.

5 0
3 years ago
Amino acids share ____ chemical groups but have ____ side chains that allow for variation. The common groups are amino and ___ g
Roman55 [17]

Answer: Amino acids share COMMON chemical groups but have UNIQUE side chains that allow for variation. The common groups are amino and CARBOXYL groups attached to an α carbon. Amino acids link together into a polypeptide via PEPTIDE bonds. Each polypeptide has a unique sequence. The repeating subunits interact with each other via hydrogen bonds to establish secondary structures. Interactions between the side chains determine the tertiary structure of the polypeptide. The combination allows for an almost infinite number of possible structures, each with a different function.

Explanation:

4 0
3 years ago
What statements are true about the circulatory and respiratory systems select all that apply?
pishuonlain [190]
Hi! I can help you if you tell me what the options are that you have to select from. 
3 0
3 years ago
Koch's postulates are used to establish the infectious agent that causes a particular infectious disease. In 1937, Thomas Rivers
Sedbober [7]

Answer:

B. The pathogen must be grown in pure culture.

Explanation:

Virus, and also some bacteria can not be cultured in "lifeless media". In the case of bacteria, we refer to the obligate intracellular ones, and all virus. Thus, this postulate can not be fulfilled in all cases. Virus can be propagated on tissue cultures, but certainly this was not considered by Koch. Moreover, these methods often result in spontaneous genetic alterations, which leads to adaptation and even attenuation in animal models of disease, so, the cultured virus perhaps does not induce the same disease when introduced to another specimen.

7 0
3 years ago
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