441. Binomial nomenclature consists of two words

A Genus and species
B Order and family
C Family and genus
D Species and variety
Answer :   Genus and species
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442. Food can be easily preserved at low temperature because at low temperature

A The food can easily be digested
B The food can easily be cooked
C The bacterial attack on food is minimised
D All of the above
Answer :   The bacterial attack on food is minimised
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443. What is formed by the germination of spores of moss

A Leafy gametophyte
B Stem
C Protonema
D Rhizoides
Answer :   Protonema
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444. The medicine of the cancer "Taxol" is obtain from the bark of which plant

A Taxus
B Ephedra
C Cycas
D Picea
Answer :   Taxus
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445. Invagination of Plasma - membrane in Bacterial cell are known as

A Mesosome
B Episome
C Acrosome
D Spherosome
Answer :   Mesosome
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446. The genetic material of procaryotic cells is called

A Nucleus
B Nucleolus
C Nucleoid
D Centrosome
Answer :   Nucleoid
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447. Dendrochronology is the

A Study of seasonal activity of cambium
B Determination of the nature of annual rings
C Study to seasonal behaviour of plants govermed by endogenous rhythm
D Determination of age of the tree by counting annual rings
Answer :   Determination of age of the tree by counting annual rings
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448. What is true for Archaebacteria

A All Halophils
B All photosynthetic
C All fossils
D Odest living begins
Answer :   Odest living begins
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449. Sweating is meant for

A Killing of skin bacteria
B Regulation of body temperature
C Removal of excess salt
D Removal of excess water
Answer :   Regulation of body temperature
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450. Which of the following yields citric acid

A Penicilliumcitricum
B Aspergillusniger
C Saccharomyces
D Azospirilium
Answer :   Aspergillusniger
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