Question # 1

In oceans especially in tropical regions temperature of surface water is about

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10^oC

15^oC

25^oC

35^oC

On the basis of structure and shape of the cap,two species of Acetabularia have been identified

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Acetabularia mediterrance & A.crenulata

A.typhi & A.mediterranea

A.crenulate & A.sisso

A.crenulata & A.arabica

Full cell cycle in yeast cells has length of.

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30 minutes

60 minutes

90 minutes

124 minutes

A gene with multiple phenotypic effect is.

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Polygenic

Bombay type

Pleiotropic

Monogenic

Shape of the plant cell does not change greatly compared with an animal cell because it is surrounded by a rigid

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Cell membrane

Capsule

Sheath

Cell wall

The pigment free area that appears at the time of fertilization is called.

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embryo

Gray crescent

Yolk

White cytoplasm

Most efficient way of supporting the body is seen.

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Fishes

Aves

Reptiles

Mammals

________ attach bone to bone and are slightly elastic.

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Ligament

Tendon

Cross bridges

Z- line

In human only one ovum is usually discharged from the ovary at one time this phenomenon is called

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Ovulation

Menstruation

Oestrous

Apomixes

Sperm are formed in.

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Vas deferens

Collecting ducts

Seminiferous tubules

Epididymis

Biome is a

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Simple community

Complex community

Regional community

Climax community

The change of frequency of alleles at locus that occur by chance is called.

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Mutation

Migration

Genetic drift

Selection

In ascidian fertilized egg, yellow cytoplasm gives rise to

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Larval epidermis

Muscle cells

Notochord

Gut

The number of spinal nerve in man is.

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12

30

31

24

Parathyroid hormone acts to ensure that

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Calcium levels in the blood never drop too low

Sodium levels in urine are constant

Potassium levels in the blood do not escalate

The concentration of water in the blood is sufficient

Germination of some seeds e.g. some lettuce varieties, is promoted by.

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Green light

Blue light

Red light

Violet light

Crossing over occurs during.

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Leptotene

Pachytene

Zygotene

Anaphase

A chromosome with unequal length of its arm is called:

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Metacantric

Sub metacentric

Acrocentric

Telocentric

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