Question # 1

There are about ____________ different kind of vertebrates on earth.

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12,000,00

47,000

12,000

47,500

There areas where living organisms interct with non -livnig components of the environment are called.

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Population

Community

Ecosystem

Species

The Molecule which have low molecular weight are called.

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Macromolecules

Micromoleules

Organic Molecules

In organic Molecules

Oxygen takes part in aerobic respiration is:

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Glycolysis

Link step between Glycolysis and Krebs cycle

Krebs cycle

Electron transport chain

A membrane-bounded disc is formed in plant cell to divide cytoplasm, this is called:

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Chloroplast

Phragmoplast

Leucoplast

Chromoplast

Cytokineses in a plant cell is characterized by:

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The equal division of homologous chromosomes

A pinching off a cell membrane to divide the cell

The formation of a cell plate in the cytoplasm

The movement of the chromosomes from the metaphase plate

The study of molecules of the called.

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Anatomy

Immunology

Physiology

Molecular bilogy

The longest phase is:

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Mitotic phase

Meiosis

Cell cycle

Interphase

Which of these are responsible for blood clotting?

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Platelets

Erythrocytes

Neutrophils

Baseophils

Families are grouped into _____________

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Classes

Phyla

Order

Species

Doforestation by uncontrolled cutting of trees means danger of _____________

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Green House effect

Soil erosion

Both a& b

None

Important cause of species extinctions is:

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Habitat loss

Deforestaion

Over population

Both a and b

Biodiversity is the source of:

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Food

Fibers

Rubber and oil

All of these

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