Apical dominance in plants is primarily controlled by which hormone?
A. Cytokinin
B. Gibberellin
C. Auxin
D. Ethylene
Answer: Option C
Solution (By JKExamLibrary)
Apical dominance is the phenomenon where the main central stem (apical bud) grows more strongly than the side stems (lateral buds). This is primarily controlled by auxin (specifically IAA), which is produced at the shoot apex and moves downwards, inhibiting the growth of lateral buds. Removal of the apical bud promotes lateral branching.
Explanation:
Pantothenic acid (vitamin B₅) is a component of coenzyme A (CoA), essential for the Krebs cycle and fatty acid metabolism. Thiamine is TPP, riboflavin FAD, biotin for carboxylation.
Consider the following statements about vitamins:
1. Vitamin B₁ is thiamine.
2. Vitamin B₂ is riboflavin.
3. Vitamin B₆ is pyridoxine.
Which of the above is/are correct?
Explanation:
Secondary consumers are carnivores or omnivores that eat primary consumers (herbivores). Example: frog eating grasshopper. Producers are autotrophs, primary consumers are herbivores, decomposers break down dead matter. Trophic levels represent energy transfer steps. Energy decreases at each higher level.
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