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Each plant or group of plants has some p...

Each plant or group of plants has some phylogenetic significance in relation to evolution. Cycas, one of the few living members of gymonsperms is called as the 'relic of past'. Can you establish a phylogenetic relationship of Cycas with any other group of plants that justifies the above statement?

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ASSERTION TYPE QUESTIONS : These questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is correct explanation of Assertion B. If both Assertion and Reason are true but Reasou is not correct explanation of Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion : Cross pollination in true genetic sense within species is called xenogamy.Reason: When there is cross pollination, resultant hybrid is a combination of characters of two plants.

These questions consist two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses. If both Assertion and Reason are true and Reason is correct explanation of Assertion. If both Assertion and Reason are true but Reason is not correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion:'Bt' toxin gene has been cloned from bacteria and expressed in plants to provide resistance from insect wihtout in need of insecticides. Reason: 'Bt' toxin is produced from bacterium Bacillus thuringiensis.

Heterospory i.e. formation of two types of spores - microspores and megaspores is a characteristic feature in the life cycle of a few members of pteridophytes and all spermatophytes. Do you think heterospory has some evolutionary significance in plant kingdom?

MODERN PUBLICATION-PLANT KINGDOM-EXAMPLE
  1. Heterospory i.e. formation of two types of spores - microspores and me...

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  2. How far does Selaginella one of the few living members of lycopodiales...

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  3. Each plant or group of plants has some phylogenetic significance in re...

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  4. The heterosporous pteridophytes show certain characteristic, which are...

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  5. Comment on the life cycle and nature of a fern prothallus.

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  6. How are the male and female gametophytes of pteriodophytes and gymnosp...

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  7. In which plant will you look for mycorrhiza and corolloid roots? Also ...

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  8. Gametophyte is a dominant phase in the life cycle of a bryophyte. Expl...

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  9. With the help of a schematic diagram describe the haplo-diptonic life ...

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  10. Lichen is usually cited as an example of 'symbiosis' in plants where a...

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  11. Explain why sexual reproduction in angiosperms is said to take place t...

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  12. Draw labelled diagrams of Female nd male thallus of a liverwort (mar...

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  13. Draw labelled diagrams of Gametophyte and sporophyte of Funaria.

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  14. Draw labelled diagrams of Alternation of generation in Angiosperms.

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  15. What are dimorphic leaves?

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  16. Define circinate ptyxis.

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  17. Explain briefly the following terms with suitable examples: sporophyll

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  18. Name a plant which is called living fossil

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  19. Name the female gametophyte in angiosperms

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  20. What is peat?

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