Answer:
Ao & oo
i don't really know if the answer is this....
I think it is d - as plants animals and insects etc all do this
A hypothesis can become A. a scientific theory if it is supported by repeated experimentation.
Amino acids are acids on one hand, and a base on the other hand.
<h3>What is an acid?</h3>
An acid is a substance that produces hydrogen or hydroxonium ions as the only positively charged ion when it ionizes.
All amino acids have an amine group - and a carboxylic group -.
The carboxylic group ionizes such that:
The presence of the amine group enables amino acids to also act as a base.
More on amino acids can be found here: brainly.com/question/14583479
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<span>They do not have a phloem or xylem.</span>