Biology
Assertion (A): Most gymnosperms are evergreen and grow in mountain areas.
Reason (R): Mountainous areas have high wind velocity and heavy rainfall. So, gymnosperms shed their leaves periodically, but not all at once.
- 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 — A is true as Gymnosperms are mostly evergreen and commonly found in mountainous and cold regions. Being evergreen helps them survive harsh conditions.
R is false as gymnosperms like pines are evergreen, meaning they do not shed all leaves periodically; they retain leaves for long periods to conserve resources in cold environments. Leaf shedding is not primarily related to heavy rainfall or wind.
Therefore, A is true but R is false is the correct option.
Related Questions
Assertion (A): The locomotory structure of all protists is a pseudopodium which is formed temporarily by the organisms towards the direction of their movement.
Reason (R): Most of the protists are aquatic and they move with the help of water current. They may have cilia or flagella for their locomotion.
- 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): Pteridophytes bear well-formed leaves, stems, roots but do not produce flowers and seeds for reproduction.
Reason (R): These plants bear small rounded bodies on the undersurface of their leaves. These bodies contain tiny spores which get scattered to produce new plants.
- 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): Monocotyledonous plants bear only one cotyledon in their seeds.
Reason (R): Monocot plants usually have long, narrow leaves with parallel veins.
- 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.
Name the following:
- The thread-like soft, delicate structures of bread mould.
- The category of organisms which feed on dead and decaying organic matter.
- The reproductive structure of Gymnosperms which bears seeds inside it.
- The root-like structures of Bryophytes.
- The cellular structure which eliminates excess water from the body of Amoeba.