Biology
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.
Classification of Plants
1 Like
Answer
A is false but R is true.
Reason — A is false as all protists do not use pseudopodia for locomotion but protists show diverse locomotory structures.
R is true as most protists are aquatic. They may move using water currents and also by specialized structures like cilia or flagella.
Therefore, A is false but R is true is the correct option.
Answered By
3 Likes
Related Questions
Which of the following category of plants contains seeds inside the cones ?
- Bryophyta
- Gymnosperms
- Pteridophyta
- Angiosperms
Assertion (A): Monerans are unicellular, primitive organisms which contain an unorganised nucleus, called as nucleoid.
Reason (R): Nucleoid is the nuclear material which is enclosed in a gelatinous capsule instead of a nuclear membrane.
- 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): 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.