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slega [8]
3 years ago
6

Another page... really need help ASAP

Biology
1 answer:
myrzilka [38]3 years ago
8 0

18) Cell B to cell A because the receptors of cell A are able to recognize the signals from cell B (signal 1). (3)

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Give one example of how natural selection can change the distribu- tion of a trait.
kaheart [24]

One example would involve the appearance of black/white lizards in the dessert. Since the white lizards would blend in the sand, they would get eaten less allowing natural selection to favor them over the black lizards. Over time, this will create an unequal distribution of lizards as there will be many more white lizards than black.

Hope this helped :)

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3 years ago
How do animals get the nitrogen they need to make protein? Short answer.
yuradex [85]

Answer:

It's kind of short u can say that.hope it will help good day

Explanation:

Animals obtain nitrogen primarily from their diet. Carnivorous animals obtain their needed nitrogen from protein in the meat they eat while herbivorous animals obtain nitrogen through plant materials that has a high protein or amino acid content such as leguminous plants.

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