Vaccinations are effective in combating future infections because they induce the production of:
a. t cells
b. neutrophils
c. prostaglandins
d. mutations in the host
d. memory cells

a. Helper T cells

Explanation:

Vaccines help develop immunity by imitating an infection. This

type of infection, however, almost never causes illness, but it

does cause the immune system to produce T-lymphocytes and antibodies.

gametes or germ cells are haploid cells (example: sperm and ova) containing only one set (or n) number of chromosomes and autosomal or somatic cells are diploid cells containing 2n number of chromosomes.

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

happy to

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