Question

Both adhesion & cohesion is found in _______

• A. Asteraceae
• B. Malvaceae
• C. Poaceae
• D. Both 1 & 2

Answer 1

Answer: (D)

Both 1 & 2

Answer 2

Adhesion is the fusion of dissimilar floral parts, while cohesion is the fusion of similar floral parts. We need to identify the plant family(ies) among the given options that exhibit both phenomena.

1. Asteraceae: This family shows epipetalous stamens (adhesion of stamens to petals) and syngenesious anthers (cohesion of anthers). The corolla is often gamopetalous (cohesion of petals), and the pistil is syncarpous (cohesion of carpels). Thus, both adhesion and cohesion are present.

2. Malvaceae: This family shows the staminal tube adnate to the petals (adhesion of stamens to petals). The stamens are monadelphous (cohesion of filaments). The pistil is syncarpous (cohesion of carpels). Thus, both adhesion and cohesion are present.

3. Poaceae: This family typically has free stamens (no cohesion or adhesion with perianth/lodicules) and free lodicules (no cohesion). The pistil is syncarpous (cohesion of carpels). While cohesion of carpels is present, the typical examples of adhesion involving stamens and perianth/petals are absent.

Since both Asteraceae and Malvaceae exhibit both adhesion and cohesion, the correct answer is the option that includes both. Option (4) states "Both 1 & 2", which covers Asteraceae and Malvaceae.

Therefore, option (4) is correct.