Biology
Which of the following category of plants contains seeds inside the cones ?
- Bryophyta
- Gymnosperms
- Pteridophyta
- Angiosperms
Answer
Gymnosperms
Reason — Gymnosperms bear seeds inside the cones. Some cones are male while others are female. Bryophyta is non-vascular plants like mosses; they do not produce seeds. Pteridophyta is ferns; reproduce by spores, not seeds. Angiosperms is flowering plants; seeds are enclosed inside fruits, not cones.
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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): 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.