I think what is indicated when, in spite of being injected with a pathogen isolated from a sick animal, another animal remains healthy; is that the animal could be immune to that particular pathogen or may be the pathogen was not pathogenic. A pathogen is an agent that causes a disease;;according to Koch postulates when isolated pathogen is injected into a healthy animal, animals must develop disease, which if the disease is not developed, then the pathogen is not pathogenic or may be the animal is immune.
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Answer:
To control what enters and leaves cell
Explanation:
The afferent and efferent neurons together form the peripheral nervous system.
<h3>What are the parts of the peripheral nervous system? </h3>
The peripheral nervous system is made up of nerves and nerve ganglia. See how they are distributed and how they act in the body. The nerves of the peripheral nervous system are like cords formed by nerve fibers arranged and surrounded by connective tissue.
in this case, the peripheral nervous system is responsible for the afferent and efferent neurons together.
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Answer:
The observable traits expressed by an organism are referred to
EXPLANATION:
An organism's underlying genetic makeup, consisting of both physically visible and non-expressed alleles, is called its genotype. Mendel's hybridization experiments demonstrate the difference between phenotype and genotype.