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4

Coagulation of blood in vessels is prevented during normal circulation by

A. heparin

B. prothrombin

C. plasmogen

D. thromboplastin

Correct Answer :

A. heparin


Related Questions

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4

The cell theory of Schleiden and Schwann states that

A. cells reproduce by mitosis or meiosis

B. all cells have nuclei

C. cells are basic units of plants and animals

D. cells arise only from pre-existing cells

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4

The bile contains the pigments

A. haemoglobin and haemoerythrin

B. biliviridin and bilirubin

C. bilirubin and haemocyanin

D. haemoglobin and biliviridin

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4

What are top carnivores?

A. biggest carnivores

B. tigers

C. all carnivorous animals

D. carnivores that are not eaten by any other animal

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4

Which among the following may carry rabies?

A. Cat

B. Dog

C. Fox

D. All the three

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4

The theory of use and disuse was used to explain evolution by

A. Lamarck

B. Darwin

C. De Vries

D. Wallace

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4

Blood is a kind of

A. epithelial tissue

B. connective tissue

C. nervous tissue

D. cartilage

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4

The disease in which blood clotting does not take place is known as

A. Xerophthalmia

B. Haemopoeisis

C. Haemophilia

D. Haemoerythrin

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4

The country where commercial production of cultured pearls is undertaken on large scale is

A. India

B. Mexico

C. Netherlands

D. Japan

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4

The science of improving the hereditary qualities of future generations of mankind is referred to as

A. genetics

B. eugenics

C. epigenesist

D. epistasis

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4

Late blight of potato is caused by

A. Puccinia

B. Pennisetum

C. Phytophthora

D. Erysiphe

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4

In phototropism, auxins

A. Promote growth of cells

B. Inhibit cell division

C. Inhibit growth of cells

D. Stimulate differential growth of cells

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4

The first person to observe the bacteria, protozoa and spermatozoa under the microscope was

A. Theodore Schwann

B. Matthias Schleidon

C. Robert Hooke

D. Leuwenhoek

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4

The spores of Puccinia formed on the leaves of wheat are called

A. Basidiospores

B. Ascidiospores

C. Uredospores

D. Pycnospores

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4

The 'father of genetics' is

A. Mendel

B. Morgan

C. Darwin

D. Muller

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4

Origin of species was published by

A. Lamarck

B. Weismann

C. de Vries

D. Charles Darwin

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4

The energy for the sperm to swim and reach the egg is provided by

A. tail

B. head

C. neck

D. mitochondria

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4

The mode of nutrition in which particulate food is devoured is

A. holozoic

B. holophytic

C. saprophytic

D. parasitic

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4

Which one of the following is not an essential micronutrient for plants?

A. Boron

B. Zinc

C. Sodium

D. Copper

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4

The metallic part in haemoglobin is

A. Copper

B. Molybdenum

C. Nickel

D. Iron

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4

A person with a blood group ____ is considered to be an universal donor.

A. A Positive

B. AB Positive

C. AB Negative

D. O Positive

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4

The cellular and molecular control o( programmed cell death is known as

A. Apoptosis

B. Ageing

C. Degeneration

D. Necrosis

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4

Which one of the following cells helps in storing water and food materials?

A. Parenchyma cell

B. Flame cell

C. Nematoblast

D. None of the above

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4

One of the following is often called the master gland. Which one is it?

A. Thymus

B. Islets of Langerhans

C. Pituitary

D. Thyroid

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4

Decomposition of organic matter is due to

A. Virus

B. Fungi

C. Bacteria

D. None of these

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4

Formation of blood

A. Histolysis

B. Histogenesis

C. Haemopoiesis

D. Haemolysis

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4

The heart of the human embryo starts beating in the _____ week of its development.

A. second

B. third

C. fourth

D. first

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4

When a movement of a plant organ is stimulated by contact with an object, it is termed

A. heliotropism

B. geotropism

C. haptotropism

D. gardening

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4

Hypogeal germination is found in

A. castor

B. onion

C. bean

D. bengal gram

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4

Organisms that depend only on raw plant products are said to be

A. herbivorous

B. vegetarian

C. carnivorous

D. omnivorous

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4

The universal recipient belongs to blood group

A. A

B. B

C. AB

D. O