Answer:
Parasitism describes a relationship between two organisms where one gets benefit and other get harm.
Explanation:
Parasitism is a type of symbiotic association that is present between two different organisms. In association, one organism gets benefit from the other and the other is damaged. For example, association between mosquitoes and human is parasitism because mosquitoes get benefit in the form of food while human is damaged due to disease cause by mosquito biting.
The mitochondria produces energy to the cell while the ribosomes produce protei.
Explanation:
The correct answer would be letter C.
The investigators could distinguish human hair from animal hair by the patter of pigmentation and by the medullary index.
The pigmentation in human hairs is denser toward the cuticle, whereas in animal hair is denser toward the medulla. Human hairs are usually one colour throughout the whole length, while animal hairs may change colour suddenly.
The medulla in humans is thinner than in animals: the medullary index for human hairs is 0.33 or less; the medullary index for animal hairs is 0.5 or more.
Answer:
materials move against a concentration gradient
