Biology
Assertion (A): Dioecious plants bear unisexual flowers on different plants.
Reason (R): Dioecious plants bear staminate and pistillate flowers on the same plant at different locations.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Answer
A is true but R is false.
Reason — In dioecious plants, the male and female unisexual flowers are borne on different plants. Therefore, A is true.
R is false because staminate and pistillate flowers occurring on the same plant at different positions is a characteristic of monoecious plants, not dioecious plants.
Therefore, A is true but R is false is the correct option.
Related Questions
Draw either an entire flower or a part of it showing the following conditions :
(a) Polysepalous calyx
(b) Gamosepalous calyx
(c) Polypetalous corolla
(d) Gamopetalous corolla
(e) Bracteate flower
Assertion (A): All the flowers of angiospermic plants are complete or perfect.
Reason (R): Angiospermic flowers can be either unisexual or bisexual.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
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.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Calyx is the outermost whorl of the flower.
Reason (R): Calyx is the whorl of sepals which protects the young flower bud. Calyx, when green, also performs photosynthesis.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.