Question # 1

Sinus venosus in case of fishes receives from the body

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Oxygenated blood

Deoxygenated blood

Both a & b

None

In case of hydra ectodermal cells get food from endodermal cells by

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Osmosis

Diffusion

Facilitated diffusion

None

Chemically 2ndary cell wall composed of

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Inorganic salts

Silica

Waxes

All of above

During the evolutionary history organisms in the kingdom Protista has evolved diversity in their

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Size and structure

Locomotion

Interaction with other organisms

All of above

The protists are

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Unicellular

Colonial

Simple multicellular

All of above

In Greek the word Karyo means

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Cytoplasm

Nucleoli

Nucleus

Protoplasm

In case of enzymes the detachable co-factor is called

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Reactant

Activator

In activator

None

Air,water,food,land,forests and wild life are

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Renewable resources

None renewable resources

Both A and B

None of these

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Oxygen combines with hemoglobin to form

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Per hemoglobin

Bioxyhemoglobin

Oxyhaemoglobin

None

The productivity can be indicated by

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Consumption of CO₂

Evolution of CO₂

Both A and B

None of these

Organisms which are very similar and have a tendency of inbreeding are called

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Species

Gene pool

Community

Niche

Respiratory activity which occur in plants during daytime is called

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Photosynthesis

Photorespiration

Photoperiodism

Vernalization

Mendel cross-fertilized a true breeding rounded seed male plant with a true breeding wrinkled seeded female plant he called it a

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First parental generation

First filial generation

2nd filial generation

All of above

System in water in which living and nonliving things exchange materials and energy is

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Hydrospheric ecosystem

Aquatic ecosystem

Major ecosystem

None of these

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