I believe it is a scab. Hope it helps! If you think this answer deserves the brainliest, then that would be very much appreciated!
The answer is:
13. B
14. D
15. A
The correct option is B.
The blood brain barrier is designed to prevent the passage of some substances such as drugs from the blood stream into the brain. The blood brain barrier is made up of high density cell barriers which restrict passage of substances into the brain area.
PP x Pp
Genotype: 50% PP, 50%Pp, 0%pp
Phenotype: 100% purple, 0% white
Pp x pp
Genotype: 0% PP, 50%Pp, 50%pp
Phenotype: 50% purple, 50% white
Pp x Pp
Genotype: 25% PP, 50%Pp, 25%pp
Phenotype: 75% purple, 25% white
pp x PP
Genotype: 0% PP, 100%Pp, 0%pp
Phenotype: 100% purple, 0% white
I hope this helped
Just like plants on land, ocean-going plankton need light from the sun to prosper and grow. But light is absorbed by ocean water, and some colors of light are absorbed more readily than others.That's why nearly all photosynthesis in the ocean takes place in the sunlit upper layers.