Morphology Of Flowering Plants

Concept: Saffron is one of the most expensive spices and is obtained from a specific reproductive part of the flower.
Step 1: Identifying the plant part.}
In Crocus sativus, the dried red-colored stigmas of the flower are used as the commercial spice saffron.
Step 2: Reason for use.}
The stigma contains aromatic compounds and pigments (like crocin) responsible for flavor, color, and fragrance.
Step 3: Eliminating other options.}

• Petals – Not used as spice.
• Stamens – Do not provide saffron.
• Ovary – Not used commercially.

Concept: The triple response in seedlings is a characteristic growth pattern observed in response to a specific plant hormone, especially under stress or mechanical impedance.
Step 1: Understanding triple response.}
The triple response includes:

• Inhibition of stem elongation
• Radial swelling of the stem
• Horizontal growth (apical hook formation)

Step 2: Identifying the hormone.}
Ethylene is the plant hormone responsible for inducing the triple response in seedlings.
Step 3: Eliminating other options.}

• Auxin – Promotes elongation, not triple response.
• Gibberellin – Stimulates stem elongation.
• Cytokinin – Promotes cell division.