<em>these are the <u>sclereids ...</u>also called stone cells which make them gritty ...
it is the type of sclerenchyma cell that may be lignified also:)</em>
Answer:<u><em>DNA and RNA are similar in structure because they both have: a sugar-phosphate backbone, and nitrogen base rungs- basically both made of nucleotides. DNA and RNA are similar in function because they both perform: protein synthesis.</em></u>
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Explanation:
The answer is A, genetic variation
Answer:
ecosystem
Explanation:
The level of organization shown in the example is "ecosystem" because the example represnts interaction between two different population with acorns on the land.
Ecosystem is defined as the interaction of groups of organisms in biological domain with abiotic enviornment.
The example, groups of organisms include "squirrels and birds" and abiotic enviornment include "acorns" or "nuts".
Hence, the correct option is "ecosystem".
