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A: Zygotic meiosis occurs at the time of...

A: Zygotic meiosis occurs at the time of germination of zygote.
R: Zygote may be diploid or triploid

A

If both As and R are correct and R is correct explanation of As

B

If both As and R are correct but R is not correct explanation of As

C

If As is correct, R is wrong

D

If both As and R are wrong.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the assertion and reason question, we will analyze both the assertion (A) and the reason (R) statements step by step. ### Step 1: Analyze the Assertion (A) The assertion states: "Zygotic meiosis occurs at the time of germination of zygote." - **Explanation**: Zygotic meiosis refers to the process where the zygote undergoes meiosis to produce haploid spores or gametes. This typically occurs in organisms with a haplontic life cycle. The zygote is formed after fertilization and must undergo meiosis to reduce its chromosome number before it can develop into a new organism. Therefore, this statement is true. ### Step 2: Analyze the Reason (R) The reason states: "Zygote may be diploid or triploid." - **Explanation**: A zygote is formed by the fusion of two haploid gametes, which means it will always have a diploid chromosome number (2n). The idea of a triploid zygote is incorrect because it would require the fusion of gametes that are not haploid. Therefore, this statement is false. ### Step 3: Conclusion Based on the analysis: - The assertion (A) is true. - The reason (R) is false. Thus, the correct relationship is that A is true, and R is false. ### Final Answer The correct answer is that the assertion is true, but the reason is false. ---
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DINESH PUBLICATION ENGLISH-ENVIRONMENTAL ISSUES-Assertion and reason
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  2. A: The Flagellum in protists is single stranded. R: Single stranded ...

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  3. A: Zygotic meiosis occurs at the time of germination of zygote. R: Z...

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  4. Meiosis is a requirements of sexual reproduction. Meiosis occurs in ...

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  5. $ In the cell wall of Dinoflagellates, there is present only one groov...

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  6. $ Euglena has mixotrophic nutrition. ! Mixtrophic nutrition means th...

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  7. Slime moulds are mainly saprophytic. Saprophytes get their nutrition ...

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  8. A: Forminiferans have a calcareous shell. R: Dimorphic nucleic are p...

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  9. $ Amoeba is a type of sporozoan. ! Sporozonas have two contractile v...

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  10. $ Fungi may be heterotrophic or autotrophic. ! Mycelium of Rhizopus ...

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  11. $ In basidiomycetes, there are present dolipore septa. ! Ascospores ...

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  12. Yeasts form a pseudomycelium. Yeast are prokaryotic.

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  13. $ In Basidiomycetes, there are preset dikaryotic cells called Synkaryo...

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  14. $ Mycorrhiza is a type of symbiosis. ! Lichens have phycobiont and m...

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  15. $ Puccinia graminis causes rust disease of wheat. ! Sexual reproduct...

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  16. $ That branch of science which deals with the study of Fungi is called...

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  17. $ Tracheophytes are the plants with vascular tissues. ! Tracheophyte...

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  18. $ A simple but dominant gametophyte is called Prothallus. ! Prothall...

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  19. A: Chlamydomonas has many pyrenoids. R;Pyrenoids help in the storage ...

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  20. A: Carrageenin can coagulate blood. R: Carrageenin is a type of phyc...

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