I need help asap please!!

commensalism

an association between organisms in which one benefits and the other derives nor harm

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

yes

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blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.