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Spiny or sticky pollen grains and large,...

Spiny or sticky pollen grains and large,attractively coloured flowers are associated with

A

a. hydrophily

B

b. entomophily

C

c. ornithophily

D

d anemophily

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ADDITIONAL QUESTIONS : The diagram below shows a germinating pollen grain and a mature ovule from an insect-pollinated flower. Some parts have been labelled. Give the letter of the nucleus which fuses with a male nucleus to form each of the following : (i) The zygote (ii) The endosperm

QUESTIONS FROM STATE BOARD EXAMINATIONS : Which of the following mostly pollinate brightly coloured flowers having fragrance and nectar?

Even though each pollen grain has two male gametes, why are at least 10 pollen grains and not 5 pollen grains required to fertilise 10 ovules in a particular carpel?

MBD-MODEL TEST PAPER -2-EXERCISE
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  2. Define adolescence.

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  3. Name the biological process that enables continuity of species.

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  4. Offspring derived by asexual reproductrion are called clones.justify b...

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  5. Name an organism where cell division in itself is a mode of reproducti...

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  6. Spiny or sticky pollen grains and large,attractively coloured flowers ...

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  7. Study the graph given below related to menstrual cycle in demales: Id...

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  8. Which of the following statement is true of yeast?

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  9. In yeast and Amoeba,the parent cell divides to give rise to two new in...

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  10. Study the graph given below related to menstrual cycle in Females: ...

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  11. What is foetal ejection reflex? Explain how it leads to parturtion?

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  12. Describe aminoacylation of tRNA.

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  13. Explain the process that takes place in the ribosomes when mRNA enters...

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  14. Due to transcription error, ATG codon of DNA is transcribed into UAG i...

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  15. What is an inducible operon ? Name the genes that constitute an operon...

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  16. Explain how lac operon operates in E.coli in the absence of an induc...

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  17. what is hybrid? Explain the procedure of obtaining a hybrid

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  18. what is humoral immunity.

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  19. How is a child protected form a disease for which he/ she is vaccinate...

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  20. Name the type of cells the AIDS virus enters after getting into the hu...

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