Biology
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.
Answer
A is true but R is false.
Reason — A is true as Monera includes unicellular, primitive organisms. They lack a well-defined nucleus; instead, they have a nucleoid, which is an unorganised nuclear region.
R is false as the nucleoid is not enclosed in a gelatinous capsule. A capsule is an outer protective layer in some bacteria, unrelated to nuclear material. There is no nuclear membrane around the nucleoid, but the statement incorrectly links it to a capsule.
Therefore, A is true but R is false is the correct option.
Related Questions
The part of the seed which stores food is :
- Seed coat
- Testa
- Seed leaves
- Tegmen
Which of the following category of plants contains seeds inside the cones ?
- Bryophyta
- Gymnosperms
- Pteridophyta
- Angiosperms
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.