SOMEONE ANSWER ASAP Which of these is true about immunity?
A
Antibodies protect us from getting the exact same virus twice.

B
Some people get the same virus over and over again.

C
People can only get a virus if they have received the vaccine for it.

D
Most people do not ever get viruses.

What kind of action is a cause of air pollution

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.

Environmental science are unconsidered with methods to preserve natural resourcesa.trueb.false