Question # 1

All ecosystems of the world combine to form:

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Community

Population

Biosphere

Competition

Each spore is covered with a thick wall called:

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Membrane

Semipermeable memebrane

Fragment

Cyst

Is the smallest bone of human body?

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Malleus

Incus

Stapes

Cochlea

It is a Hallocinogen.

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Marijuana

Aspirin

Morphine

Codine

The primary chemical stimulus for breathing is the concentration of.

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Carbon dioxide in blood.

Oxygen in blood

Carbon oxide in muscles

Oxygen in muscles.

Which of the following organisms are decomposers?

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Fungi

Algae

Bacteria

Both a and c

All of these are hormones except:

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Insulin

Thyroxin

Glucagon

Pepsinogen

Which diisease is caused by Streptococcus pneumoniae:

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Bronchites

Emphysema

Pneumonia

Asthema

Night blindness is caused due to the deficiency of _______ in body.

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Vitamin A

Lodopsin

Protein

Fats

Ribosome reads the sequence of mRNA nucleotides and joins specific amino acids to form protein . This step is known as.

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Combination

Replication

Transcription

Translation

In certain parts of body, cell bodies of many neurons form a group enveloped by a membrane. such group is called:

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Tissues

Nerves

Ganglion

Receptors

Living of nitrogen fixing bacteria in the roots nodules of Leguminous plant is an example of.

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Predation

Parasitism

Mutualism

Commensalism

By which method sponges, hydra and corals reproduce?

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Fragmentation

Spores

Regeneration

Budding

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