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The male anopheles mosquito synthesizes ...

The male anopheles mosquito synthesizes an anticoagulant to keep the blood of its prey flowing during feeding.

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Assertion : There is no chance of transmission of malaria to a man on the bite of a male anopheles mosquito. Reason : It carries a non virulent strain of plasmodium.

Assertion: There is no chance of transmission of malaria to a man on the bite of a male Anopheles mosquito. Reason: It carries a non virulent strain of Plasmodium.

Which one of the following plants keep its stomata open during the night and close during the day?

Mouth parts of male anopheles/mosquito are of type

What is the probosics? Did it help in the male mosquito in sucking blood? How it is used by mosquito to spread disease?

In the atmosphere, carbon dioxide is found in two forms, i.e., ^12CO_2 and ^14CO_2 . Plants absord CO_2 during photosynthesis in presence of chlorophyll, plants synthesise glucose 6CO_2 +6 H_2O rarr C_6H_12O_6 + 6O_2uarr Half life of ^14CO_2 is 5760 years. The analysis of wooden artifacts for ^14C and ^12C gives useful information for determination of its age. All living organisms, because of their constant exchange of Carbon dioxide with the surroundings have the same ratio of C-14 to C-12, i.e. 1.3xx10^-12 . When an organism dies, the C-14 in it keeps on decaying as follows: 6^14Crarr7^14N+(-1)^0e +Energy Thus, the ratio of C-14 and C-12 decreases with the passage of time. We can measure the proportion of C-14 in the remains of dead organism and determine how long ago it died. The method of carbon dating can be used to date anything made or organic matter, e.g., bone, skeleton, wood, etc. Using carbon dating, materials have been dated to about 50,000 years with accuracy. C-14 exists in atmosphere due to:

In the atmosphere, carbon dioxide is found in two forms, i.e., ^12CO_2 and ^14CO_2 . Plants absord CO_2 during photosynthesis in presence of chlorophyll, plants systhesise glucose 6CO_2 +6 H_2O rarr C_6H_12O_6 + 6O_2uarr Half life of ^14CO_2 is 5760 years. The analysis of wooden artifacts for ^14C and ^12C gives useful information for determination of its age. All living organisms, because of their constant exchange of Carbon dioxide with the surroundings have the same ratio of C-14 to C-12, i.e. 1.3xx10^-12 . When an organism dies, the C-14 in it keeps on decaying as follows: 6^14Crarr7^14N+(-1)^0e +Energy Thus, the ratio of C-14 and C-12 decreases with the passage of time. We can measure the proportion of C-14 in the remains of dead organism and determine how long ago it died. The method of carbon dating can be used to date anything made or organic matter, e.g., bone, skeleton, wood, etc. Using carbon dating, materials have been dated to about 50,000 years with accuracy. A piece of wood from an archeological source shows a C-14 activity which is 60% of the activity found in fresh wood today. The age of archeological sample will be:

SANTRA PUBLICATION-CLASSIFICATION OF LIVING ORGANISMS-TRUE OR FALSE
  1. All photosynthetic protisa posses chl-a.

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  2. Eye spots of euglenoids are able to sense movement as they lie close t...

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  3. The male anopheles mosquito synthesizes an anticoagulant to keep the b...

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  4. The fungus which grows within the root surface is called endomycorrhiz...

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  5. Fungi that grow on skin and scalp are called dermtophytes.

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  6. The most common method of vegetative propagation is budding.

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  7. The hyphae without crosswalls are called aseptate.

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  8. Rhizopus from single spore culture can produce zygospores.

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  9. In Basidiomycotina well developed sex organs are present.

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  10. In mushrooms sex organs are complicated structures.

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  11. What is external fertilisation

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  12. Rhizopus is a gill fungus.

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  13. In case of Agaricus somatogamy takes place.

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  14. Potato spindle tube disease is due to a bacterium.

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  15. RNA-retroviruses have a special enzyme that trancribes vira RNA to cDN...

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  16. Prion consists of both DNA and RNA.

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  17. Potato leaf roll or leaf curl of papaya are caused by viruses.

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  18. Lichens multiply by the production of soridia.

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  19. Symbiotic relationship between an alga and a fungus occurs in Mycorrhi...

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  20. In lichens, sexual reproduction is usually performed by the fungal par...

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