Which one of the following is a type of passive transport?
a. proton pumps
b. osmosis
c. endocytosis
d. exocytosis

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

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Explain how organisms could be harmed by high levels of salt from roadways?