All of the following reproductive structures are considered female except a. stigma. b. petal. c. ovary. d. ovule.

The correct answer is option - B. petal.

Explanation:

The female reproductive organs of a flower are included carpel and each carpel has an ovary, style, and stigma. The ovary is the organ that produces ovules (the female reproductive cells). Style is a tube-like structure present on the ovary. Stigma is the structure that receives the pollen during fertilization.

petal is the leaves that are modified and covers the reproductive structure of the plant. Generally, petals are bright in color to attract pollinators.

Thus, the correct answer is option B, petal.

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure