Question

which lists tissues or structures in the order haploid, diploid, triploid?
endosperm, pollen, petal
petal, pollen, endosperm
pollen, petal, endosperm
pollen, endosperm, petal
petal, endosperm, pollen

Explanation:

Pollen is a male - gametophyte in plants and is haploid. Petals are somatic plant cells and are diploid. Endosperm in angiosperms is formed by the fusion of a sperm (haploid) with two polar nuclei (each haploid), resulting in a triploid structure.

Answer:

C. pollen, petal, endosperm