Once a pollen grain lands on the stigma, a(n) is produced that grows down the style and into the ovary.
a. pollen tube
b. endosperm
c. conjugation tube
d. hilum

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

c.more precipitation,but only when emission levels.