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Which one of the following is essential for blood clotting?

A. RBC

B. WBC

C. Blood platelets

D. Lymph

Correct Answer :

C. Blood platelets


Related Questions

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The juice from the leaves of ________ is used for the treatment of diarrhoea, cholera and dysentery.

A. Caeselpinea

B. Bryophyllum

C. Centella

D. None of the above

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Who was the first scientist to use an instrument for biological studies in 1665?

A. Robert Hooke

B. Schwann

C. Schleiden

D. None of the above

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Organisms which synthesise their own food are called

A. autotrophs

B. heterotrophs

C. saprotrophs

D. auxotrophs

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The closing and opening of the leaves of Mimosa pudica (Touch me not) plant is due to _______ movement.

A. chemonastic

B. seismonastic

C. thermonastic

D. photonastic

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Darwinism does not explain

A. progression

B. retrogression

C. usefulness of all organs

D. presence of vestigial organs

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The tallest tree in the world Sequoia™ is found in

A. UK

B. USA

C. former USSR

D. China

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Hypogeal germination is found in

A. castor

B. onion

C. bean

D. bengal gram

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The grouping of blood is based on substances called

A. antibodies

B. antigens

C. antitoxin

D. enzymes

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Two tall plants, each being a hybrid and carrying a recessive factor for dwarfness are crossed. What proportion of their offspring will be dwarf?

A. 0.5

B. 0.25

C. 0.75

D. 1

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The pigment which is responsible for blood clotting is

A. Fibrinogen

B. Haemoglobin

C. Glucose

D. Blood cells

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Prions are composed largely of

A. DNA

B. proteins

C. RNA

D. None of these

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Origin of species was published by

A. Lamarck

B. Weismann

C. de Vries

D. Charles Darwin

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The development of new organs is termed

A. Parthenogenesis

B. Morphogenesis

C. Histogenesis

D. Paedogenesis

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Which of the following is NOT a viral disease?

A. Chicken-pox

B. Influenza

C. Epilepsy

D. Measles

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Eye is an organ that can be called as

A. Phonoreceptor

B. Thigmoreceptor

C. Photoreceptors

D. Rheoreceptor

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Cutting and layering are the methods of plant propagation usually referred to as

A. asexual reproduction

B. sexual reproduction

C. vegetative reproduction

D. gardening

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Which among the following is a Cast growing tree?

A. Teak

B. Eucalyptus

C. Banyan

D. Coconut

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Vivipary is defined as germination

A. during storage

B. within the fruit

C. with cotyledons coming out of soil

D. with cotyledons remaining inside the soil

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Typhoid is a disease caused by

A. virus

B. bactena

C. fungus

D. animal

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Nucleus was first discovered by

A. Porter

B. Robert Brown

C. Palade

D. None of these

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Accepted theory for the origin of life is

A. Cosmozoic theory

B. Biogenesis

C. Abiogenesis

D. Oparin's theory

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Afforestation means

A. study of forests

B. growing new forests

C. destroying the forests

D. go into the forests

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The following disease is prevented by triple-antigen immunization

A. Diphtheria

B. Tuberculosis

C. Smallpox

D. Mumps

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Xerophthalmia is a deficiency disease. Deficiency of _________ causes it.

A. vitamin A

B. vitamin B

C. vitamin C

D. vitamin E

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Which among the following is a communicable disease?

A. Beri Beri

B. Diabetes

C. Leucoderma

D. Dysentery

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The phenomenon of summer sleep by animals is called

A. hibernation

B. aestivation

C. laziness

D. lethargy

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Whale reproduces by

A. ovipary

B. vivipary

C. ovovivipary

D. fission

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pH of blood remains constant due to

A. blood pressure

B. buffer action

C. perspiration

D. respiration

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Man is warm-blooded, frog is cold-blooded, Which one of the following is cold-blooded?

A. snake

B. peacock

C. parrot

D. camel atmospheric pressure

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The insects do not have blood pigments because

A. there is no blood

B. blood does not have a respiratory function

C. tissues have pigments

D. pigments are elsewhere