Question

Gynoecium is syncarpous and ovary is unilocular in the family-
a. Mimosoideae
b. Compositae
c. Papilionaceae
d. Cruciferae

Answer 1

Most of this family's members are herbs that are annual or perennial, but shrubs, vines, or trees are also a significant number. The family has a worldwide distribution and is a very large family of flowering plants that are widespread.

Complete answer:

Option A is incorrect. Gynoecium is monocarpellary, superior ovary, unilocular, marginal placentation, one or more carpal ovules, long and filiform type, minute and simple stigma. It's commonly referred to as the Acacia family. The members are found mainly in tropical and subtropical areas.

Option B is correct. Gynoecium with single anatropous ovule, basal placentation, bicarpellary, syncarpous, inferior, unilocular; simple, long style, bifid stigma. The family is often referred to as the Sunflower family. It is the largest of the dicotyledon family. In the tropics and in cold arctic or alpine areas, they are distributed and plentiful worldwide.

Option C is incorrect. Gynoecium is monocarpellary; superior ovary, unilocular, marginal placentation, multiple ovules on the ventral suture; flattened, hairy or without hair, long style, slightly bent at the apex (Mucuna): stigma simple or capitate (Mucana). It's usually called the family of peas. Xerophytes, mesophytes, hydrophytes and halophytes are members of this family.

Option D is incorrect. Gynoecium is seldom tricarpellary bicarpellary (Lepidium sativum), syncarpous, superior ovary, unilocular, becomes bilocular due to false septum growth called replum: parietal placentation, several ovules, short style, plain or bifid stigma. This family is also called the Family of Brassica. It is spread globally, but primarily restricted to the regions of the Mediterranean and northern temperatures.

Hence, the correct answer is option (B).

Note: Asteraceae is a family of economic importance that supplies products such as cooking oils, leafy vegetables such as lettuce, sunflower seeds, artichokes, sweeteners, substitutes for coffee and herbal teas. Asteraceae members normally contain taproots, but they also have fibrous root systems.