Match the pollination types in List-I with their correct mechanisms in List-II:
List-I (Pollination Type) | List-II (Mechanism) |
---|---|
A) Xenogamy | I) Genetically different type of pollen grains |
B) Ophiophily | II) Pollination by snakes |
C) Chasmogamous | III) Exposed anthers and stigmas |
D) Cleistogamous | IV) Flowers do not open |
The correct matching is:
- A-II: Xenogamy involves pollination with genetically different pollen (cross-pollination).
- B-I: Ophiophily (snake pollination) requires exposed reproductive structures for snake access.
- C-IV: Chasmogamous flowers open to expose anthers/stigmas (opposite of cleistogamous).
- D-III: Cleistogamous flowers never open (self-pollination).
Corrections:
- The original options had inconsistencies (e.g., "A-IV" in option 4 mismatches snake pollination with xenogamy).
- Reordered pairs to align with biological definitions.
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Both wind and water pollinated flowers are not very colorful and do not produce nectar.
Reason (R): The flowers produce enormous amounts of pollen grains in wind and water pollinated flowers.
In light of the above statements, choose the correct answer from the options given below:
If \( \vec{u}, \vec{v}, \vec{w} \) are non-coplanar vectors and \( p, q \) are real numbers, then the equality:
\[ [3\vec{u} \quad p\vec{v} \quad p\vec{w}] - [p\vec{v} \quad \vec{w} \quad q\vec{u}] - [2\vec{w} \quad q\vec{v} \quad q\vec{u}] = 0 \]
holds for: