Question # 1

Biotic components of ecosystem are

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Animal and plants

Micro-organisms

Fungi

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

Soil can be defined as

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The upper layer of earth's crust

Lower lager of earth's crust

Collection of natural resources

All above

Which statement about prokaryotic cells is true

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Prokaryotes have a definite nucleus

They are modern type of cells

Fungi and protista included in prokaryotes

Their nuclear material is directly submerged in the cytoplasm

The fungal associations with roots of higher plants help______uptake by the plants

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Water

Minerals

Both a & b

None

Which of the following is more resistance to decay

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Cellulose

Lignin

Chitin

Waxes

Fertilization in bryophytes takes place in

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Air

Water

Soil

None

The of life cycle of cell b/w two consecutive divisions is termed as the

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Prophase

Inter phase

Amaphase

Telophase

The specialized microtubule structure called mitotic apparatus including

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Aster

Spindle

Both A and B

None

Growth occurs though the activity of meristem

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In vascular plants

In coniferous plants

In bryophytes

In pterodophytes

Plants that are stimulated to flower by exposure to low temp is called

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Biennial

Perennial

Vernalization

Parthenocarpy

Growth effected by many factors

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Ultraviolet rays

Cathode rays

Anode ray

Gamma rays

Lithospheric ecosystem is

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Terrestrial

Aquatic

Aerial

Desert

Highly condensed portion of chromatin is called

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Euchromatin

Heterochromatin

Chromatin

All of above

The outer most boundary in most of the plant cells is

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Cell wall

Cell membrane

Primary wall

None

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