Read the given statements about auxins and state whether they are true or false :
a. Auxin promotes apical dominance.
b. Auxins have a negative impact on cytokinin levels.
c. F.W went isolated auxins from the coleoptiles of the coleptiles of the oat plant.
d. Auxin promotes flowering in the pineapple plants.

Options

A. a - false, b - false, c-true, d - false
B. a - true, b - false, c - true, d - true
C. a - true, b-false, c - true, d - false
D. a - false, b - true, c - true, d- true

Answer

To determine whether the given statements about auxins are true or false, let's analyze each statement step by step:

### Step 1: Analyze Statement A
**Statement A:** Auxin promotes apical dominance.
**Analysis:** Auxins are known to promote apical dominance, which is the phenomenon where the main central stem of the plant grows more strongly than the other side stems. This occurs because auxins are produced at the apex of the plant, inhibiting the growth of lateral buds.
**Conclusion:** True

### Step 2: Analyze Statement B
**Statement B:** Auxins have a negative impact on cytokinin levels.
**Analysis:** Auxins and cytokinins are both plant hormones that often work in balance with each other. Auxins do not have a negative impact on cytokinin levels; instead, they can promote the effects of cytokinins in certain contexts. Therefore, this statement is misleading.
**Conclusion:** False

### Step 3: Analyze Statement C
**Statement C:** F.W. Went isolated auxins from the coleoptiles of the oat plant.
**Analysis:** F.W. Went is credited with isolating auxins from the coleoptiles of oat plants (Avena sativa). His experiments were foundational in understanding plant hormones.
**Conclusion:** True

### Step 4: Analyze Statement D
**Statement D:** Auxin promotes flowering in pineapple plants.
**Analysis:** Auxins are known to play a role in the flowering process of certain plants, including pineapple. They can induce flowering under specific conditions.
**Conclusion:** True

### Final Summary of Statements:
- A: True
- B: False
- C: True
- D: True

### Final Answer:
a. True
b. False
c. True
d. True

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