Bobby did not learn to read until he was an adolescent. When he did learn to read, it was much harder for him than it was for his peers. If Bobby had learned to read during the early and middle childhood years, he would have acquired literacy skills much more efficiently. Bobby's difficulty learning to read as an adolescent demonstrates the concept of a(n) " period."

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explanation:

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.

it is a. i hope this .