Question # 1

Chiasmata formation take place duirng.

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Leptotene

diakinesis

Diplotene

Pachytene

In succesion lithoseres takes place on:

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Sand

Water

Forest floor

Bare rocks

Each type of the principal type of sensation that we can experience e.g pain touch sight sound and so for this called a modality of

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Regulation

Susceptibility

Coordination

Sensation

Blood supplied to kidneys from each cardiac beat is.

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10%

20%

30%

50%

An animal that worms itself mainly by absorping from its surroundings is known as:

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Homoiotherm

Ectotherm

Endotherm

None of these

Sunkens stomata are found in which of the following group of plants.

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Hydrophytes

xerophytes

Bryophytes

Mesophytes

Which one of the following is initiation codon.

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AUG

GUA

UGA

GAC

Commonly used restriction enzyme is

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Ecor4

Eco R3

EcoR2

EcoR1

Environmental factors causing abnormal development are grouped together as.

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Toxins

Carcinogens

Teratogens

Mutagens

There are__ muscles in the human body., most of which occur in pairs.

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650

630

660

645

A combination of three nucleotides of DNA that specifies as amio acid is called.

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Cistron

Anticodon

Genetic code

Entron

The rate of heat production is increased by increasing muscle contraction by movement is called.

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Thermoregulation

Shilvering thermogenesis

Non shievering

Thermostat thermogenesis

Fresh water ecosystem covers less than.

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1%

3%

5%

7%

The basic difference betweenn spermatogenesis and oogenesis is that :

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During spermatogenesis two more polar bodies are produced

The mature ovum is haploid while the sperm is 1n

Spermatogenesis involves mitosis and meiosis, but oogenesis involves meiosis only

In oogenesis, one mature ovum is produced, and in spermatogenesis four mature sperm are produced

External genitalia of human male consist of a pair of testes which lie outside the body in the sac like

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Pouch

Marsupium

Scrotum

Bag

Adult transgenic tobacco plants glowed when sprayed with the substrate

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Luciferon

Luciferin

Luciferol

Luciferase

The no of chromosome in mouse is

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6

32

26

40

Buoyancy in the water is maintained by a specialized structure in bony fish called

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Fins

Swim bladder

Tail

Both a & c

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