Question

Find the odd one out in each group and give reasons for your choice.

• A. Stigma
• B. Style
• C. Filament
• D. Ovary

Answer 1

The correct option is C

Filament

The correct option is C:
Explanation for the correct option:

1. Androecium is the male reproductive part of the flower.
2. The basic structural and functional units of androecium are known as stamens.
3. Stamens are divided into two parts, Ba bilobed another and a long cylindrical filament.
4. Anther is a bilobed structure that stores fine particles known as pollen grains. Male gametes are present inside pollen grains.
5. Filaments are thin, long, and narrow stalks.

Explanation for incorrect options:
Option A:
The gynoecium is the female reproductive part of the flower which consists of a carpel that is divided into stigma, style, and ovary.
The stigma is an expanded, feathery, receptive platform used as the landing site for the pollen grain.

Option B:
Style is a tubular outgrowth arising from the ovary.

Option D:
The swollen part of the carpel is known as the ovary. It provides a home to small, round egg-like structures called ovules. Ovule contains the female gametes.

Final answer: Filaments are part of the stamen.