Question # 1

What would be the best experimental design for testing a hypothesis that bean plants require sodium?

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Measure the amount of sodium in a few bean plants

Grow bean plants with and without sodium

Look for sodium in leaf tissues

Analyze root contents for sodium

PH of human blood is ......................... .

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7.1

7.2

7.3

7.4

It is at the risk of becoming extinct because few members are left:

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Extinct

Threatened

Valnerable

Endangered

Pepsin works at the PH of ............... .

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1

2

3

4

When the last member of a particular species dies, the species is said to be______.

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Established

Extinct

Threatened

Endangered

The Molecule which have low molecular weight are called.

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Macromolecules

Micromoleules

Organic Molecules

In organic Molecules

Ulcers occur in the:

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Stomach

Duodenum

Esophagus

All of these

Mustard Platn is sown in

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Winter

Summer

Spring

Autum

Who introduced Taxon of 'order' in classification?

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Caesalpino

John Ray

Tournefort

Rivinus

The purpose of respiration is to ................ energy.

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Absorb

Release

Both

None

Who described cells first?

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Robert Hooke

Leeuwenhook

Robert Brown

Scheiden & Schwann

Which group of enzymes breaks up starches and other carbohydrates?

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Proteases

Lipases

Amylases

None of these

Cellular organization is absent in:

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Viruses

Bacteria

Algae

Protozoans

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Biology 9th Class English Medium Online Test MCQs With Answers

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