Question # 1

The skeleton of birds is light due to.

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Extension of lungs

Air chambers

Air spaces

Air sacs

The most recent ear is

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Paleozoic

Cenozoic

Mesozoic

Protozoic

The branch of biology which deals with the study of ancestral history of living organisms is called.

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Paleontology

Genetics

Evolution

Heredity

Shrinkage of protoplast due to ex osmosis of water is called.

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Plasmolysis

Imbibition

Guttation

Bleeding

Muscles of stomach are of which type.

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Skeletal

smooth

Cardiac

Voluntary

Sepia belong to.

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Cephalopoda

Myriapoda

Gastopoda

Annelida

A group of ribosome attached to mRNA is known as

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Lysosome

Peroxisome

Poly some

Glyoxisome

Resolution of human naked eye is.

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162

262

242

252

Which of the following is not true about histamine.

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Produced by basochills

cause inflammation

Causes dilation of blood capillaries

Released by Eosinophils

In the lytic cycle of a bacteriophage, the host DNA is

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Replicated

Turned off by a protein coat

Digested into its nucleotides

Turned on by the removal of a protein coat

The ions involved in the opening and closing of stomata are.

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Sodium

Calcium

Magnesium

Potassium

In xerosere, polytrichum and tortula represent.

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Herbaceous stage

Moss stage

Follage lichen stage

Crustose lichen stage

1 g of ammonia nitrogen requires how much water for excretion.

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50 ml

250 ml

100 ml

500 ml

Downs syndrome (Mongolism) occurs in man during which 21^st chromosome falls to segregate resulting gamete with

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20 chromosomes

21 chromosomes

22 chromosomes

24 chromosomes

The category of plants that has adaptation of small and thick leaves to limit water loss is called.

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Hydrophytes

Xerophytes

Aygrophytes

Mesophytes

At the distal end the femur forms knee joint with the proximal end of two parallel bones called

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Tibia and fibula

Radius & ulna

Carpals & metacarpals

Tarsal & metatarsal

Which hormone is chemically steroid .

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ADH

Corticosherone

Insulin

Thyoxine

The average cell cycle in human is.

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24 hours

26 hours

28 hours

30 hours

Etiolated plants grow without.

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Water

Light

O2

CO2

In natural selection, the environment plays role affecting the proportions of gene in .

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Population

Community

Area

Blome

Cancer occurs due to error in

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Binary fission

Budding

Mitosis

Meiosis

The concentrations of cell bodies of neuron are

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Ganglia

Dendrites

Axons

Nodules

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