Question # 1

Secondary growth leads to an increase in the diameter if the.

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Leaf

Root

Stem

Stem and root

Fresh water ecosystem covers less than

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7%

5%

3%

1%

A plant has a growth pattern called.

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Open growth

Meristem

Growing point

Apical

Darwin's origin of species was published in.

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1840

1859

1865

1890

A woman can be bald only when she is

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Homozygous domunant

Heterozygous

Homozygous recessive

Maleness

A collection of bacterial and phage viruses clones containing a particular segment of DNA from the source cell is called.

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Expressing system

Genome

Genomic library

Recombinant DNA

Effective drug available for Parkinson's disease is.

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Nicotine

GDNF

AZT

L-dopa

In 1882, chromosomes were first observed by.

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John Brown

T.H.Morgan

Walter fleming

Walther sutton

During which stage chromosomes are doubling

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G2 Phase

G1 phase

S-Phase

G0 Phase

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

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Green light

Blue light

Red light

Violet light

Tubes that connect the middle ear with the throat in humans are called.

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eustachian tube

Fallopian tube

Neural tube

Nephridial tube

Interatrial vertebrates, the gill pouches develop into.

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Gills

Lungs

Nose

Eustachian tube

The form of learning which involve a diminish of response to repeated stimuli

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Imprinting

Habituation

Insight learning

Large learning

The outer layer of the blastocyst, which laterattaches tothe uterus , is:

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Deciduas

Trophoblast

Ammion

Inner cell mass

Gastrin is the hormone produced by mucosa of

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Oesophagus

Small intestine

Stomach

Large intestine

O blood has neither A or B antigen but it does have

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Anti - A antibodies

Anti - B antibodies

Anti - O antibodies

Both a & b

Cacti and Euphorbia are the desert plants which store water in their.

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Fleshy leaves

Freshy stems

Freshy roots

Freshy buds

DNA changes are called mutations and the organisms that have undergone such changes are called

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Wild types

Changer

Mutants

Transmutants

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