Biology
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.
Classification of Plants
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Answer
Both A and R are true but R is not the correct explanation of A.
Reason — A is true as Monocotyledons have seeds that contain only one cotyledon.
R is true as Monocots typically have long, narrow leaves with parallel venation (parallel veins), such as in grasses and lilies.
The number of cotyledons (seed leaves) is determined by embryonic development, not by leaf shape or venation.
Therefore, Both A and R are true but R is not the correct explanation of A is the correct option.
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Related Questions
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.
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- 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.
Correct the following statements by changing the first/ last word only :
- Unicellular, prokaryotic organisms are termed as protists.
- Animals do not possess a nervous system.
- Mushroom is a unicellular fungus.
- Rod-shaped bacteria are called cocci.
- Reserve food material in bacteria is starch.