Question # 1

The mechanism of evaporative cooling in respiratory tract of dog is known as

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Panting

Shievering thermogenesis

Thermoregulation

vasodilation

The human embryo is referred to as the fetus from beginning of.

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3rd month

3rd week

6th months

6th week

Which of the following statements conserning the role of Ca⁺² inthe contraction of skeletal muscle is correct?

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The mitochondria act as a store of Ca⁺²for the contractile process

Ca⁺²entry across the plasma membrane is important in sustaining the contraction of skeletal muscle

A rise in inter cellular Ca⁺²allows actin to interact with myosin

The tension of a skeletal muscle fiber is partly regulated by G proteins muscle

The living organisms producing their own food.

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Heterotrophs

Consumers

Green plants

Decomposers

In turner syndrome the affected person have set of chromosomes.

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XO

XXY

XYY

XXO

Active membrane potential is

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0.05 volts

- 50 mv

Both a & b

0.07 volts

Movement of rearrangement of the cells in the embryo is called.

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Cleavage

Gastrulation

Fertilization

Organogenesis

Which of the following hormones is not released by the anterior pituitary?

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Melanocyte - releasing hormone

Gonadotropin-releasing harmone

Thyroid- stimulating hormone

Growth hormone

Metal illness causes.

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Alzheimer

Diphteria

Hemophilia

Kwashiorkor

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

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Homoiotherm

Ectotherm

Endotherm

None of these

At cytokinesis in plants a membrane structure phragmoplast is formed from vesicles which originate from

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Lysosomes

Centrioles

Golgi complex

Glyoxisomes

Amino acid attachment site of tRNA is.

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G-end

2' -end

3'- end

5' -end

Interatrial vertebrates, the gill pouches develop into.

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Gills

Lungs

Nose

Eustachian tube

The temperature more effective for vernalization is

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4 ^oC

8^oC

12^oC

16^oC

Expression of a trait is termed as

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Genotype

Phenotype

Dominance

Wild type

In human, relay centre is located is

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Fore brain

Mid brain

spinal cord

Hind Brian

Antidiuretic hormone is also called

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Oxytocin

ACTH

Vasopressin

Both a & b

A natural process in which surface soil is removed by the action of water or wind is

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Corrosion

Attrition

Erosion

Weathering

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