Some hyperthermophilic organisms that grow in highly acidic (pH2) habitats belong to the two groups:
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(a) Eubacteria and archaea (b) Cyanobacteria and diatoms (c) Protists and mosses (d) Liverworts and yeasts
Correct Answer: […]
Heartwood differs from sapwood in:
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(a) presence of rays and fibres (b) absence of vessels and parenchyma (c) having dead and non -conducting elements (d) being susceptible to pests and pathogens
Correct […]
Which one of the following statements about certain given animals is correct?
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(a) Round worms (Aschelminthes) are pseudocoelomates (b) Molluscs are acoelomates (c) Insects are pseudocoelomates (d) Flat worms (Platyhelminthes) are coelomates
Which one of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is correct?
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(a) Penguin is homeothermic while the remaining three are poikilothermic (b) Leech is a […]
The plasma membrane consists mainly of:
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(a) phospholipids embedded in a protein bilayer (b) proteins embedded in a phospholipid bilayer (c) proteins embedded in a polymer of glucose molecules (d) proteins embedded in […]
An improved variety of transgenic basmati rice
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(a) does not require chemical fertilizers and growth hormones (b) gives high yield and is rich in vitamin A (c) is completely resistant to all insect […]
Wind pollinated flowers are
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(a) small, brightly coloured, producing large number of pollen grains (b) small, producing large number of dry pollen grains (c) large producing abundant nectar and pollen (d) small, […]
Select the two correct statements out of the four(a-d) give below about lac operon. (i) Glucose or galactose may bind with the repressor and inactive it (ii) In the absence of lactose the represor binds […]
Sertoli cells are found in
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(a) ovaries and secrete progesterone (b) adrenal cortex and secrete adrenaline (c) seminiferous tubules and provide nutrition to germ cells (d) pancreas and secrete cholecystokinin
Correct Answer: […]
The permissible use of the technique amniocentesis is for
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(a) detecting sex of the urborn foetus (b) artificial insemination (c) transfer of embryo into the uterus of the surrogate mother (d) detecting […]
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