The immune system must be activated to obtain immunity from a pathogen.
a. primary
b. non-specific
c. specific
d. innate

Explain the importance of producers, primary consumers, secondary consumers and decomposers in an ecosystem.

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

Sweating and breathing is an example of differentiation specialization maintaining homeostasis metabolism