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bearhunter [10]
3 years ago
14

The purpose of the ______ system is to prevent foreign substances from entering the body and to attack foreign substances that a

re in the body.
A. immune
B. endocrine
C. nervous
D. excretory
Biology
2 answers:
earnstyle [38]3 years ago
7 0

Answer:

Immune

Explanation: The immune system is the body's defense against infectious organisms and other invaders. Through a series of steps called the immune response, the immune system attacks organisms and substances that invade body systems and cause disease. The immune system is made up of a network of cells, tissues, and organs that work together to protect the body.

kaheart [24]3 years ago
3 0
A. Immune because this is what the immune systems job is
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Different variant forms of a gene are referred to as ______________
slavikrds [6]

Answer:

Alleles.

Explanation:

Gene may be defined as the functional segment of DNA that codes for the particular protein. Genes are responsible for the phenotype and genotype of the organism. Each gene may exist in multiple forms.

The variants forms of the genes are known as alleles. Alleles are the alternative form of the same gene. A single gene may have atleast two alternative form. These alternative forms together contribute the functional aspect of the organism.

Thus, the correct answer is alleles.

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2 years ago
If an organism has high biological fitness in one environment, does that mean that it would also have high biological fitness in
Marina86 [1]

The answer is no, high biological fitness in one environment doesn’t have to be high in another environment.

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