Biology
Assertion (A): All the flowers of angiospermic plants are complete or perfect.
Reason (R): Angiospermic flowers contain all the four floral whorls — Calyx, Corolla, Androecium and Gynoecium.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Flower
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Answer
Both A and R are False.
Reason — Many angiosperms bear incomplete flowers that lack one or more floral parts. For example, unisexual flowers of papaya (dioecious) or maize (monoecious). Hence, the assertion is false.
Because incomplete flowers exist, it is not true that every angiosperm flower possesses all four whorls (calyx, corolla, androecium, gynoecium). Hence, reason is false.
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Related Questions
Soumya tried to match the floral whorls with their constituting units.
She tabulated the pairs as follows:Unit Floral whorl P Perianth Q Androecium Identify P and Q
- P — Petals, Q — Carpels
- P — Tepals, Q — Stamens
- P — Sepals, Q — Petals
- P — Carpels, Q — Stamens
A biology teacher asked her students to give two examples of dioecious plants.
Ishan said: Maize and Palm.
Aashish said: Pumpkin and Papaya.
Palak said: Palm and Papaya.
Payal said: Pumpkin and Maize.Who was correct?
- Ishan
- Aashish
- Palak
- Payal
Assertion (A): Dioecious plants bear hermaphrodite flowers on different plants.
Reason (R): Dioecious plants bear staminate and pistillate flowers on the same plant.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): The kind of androecium in which the stamens are united in one group by their filaments is termed as Monadelphous.
Reason (R): Monadelphous stamens are found in Pea and Bombax flowers.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.