Question # 1

It is a group of related orders:

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Genus

Class

Species

Family

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

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Population

Community

Ecosystem

Species

When we add more substrate to an already occurring enzymatic reaction and there is no increase in the rate of reaction what would you predict?

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All active sites have been occupied by substrate molecules

The enzyme molecules have denatured

More substrate acted as inhibitor

More substrate has disturbed the pH of the medium

The microscopic study of tissues is called.

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Physialogy

Morphology

Histology

Entomology

There are _________ P-bonds in an ATP molecule.

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Two

Nine

Six

Four

Who reported that all animal tissues are also composed of individual cells?

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Robert Hooke

Lorenz Oken

Robert Brown

Schwann

The reactions which do not require light during photosynthesis are called __________ reactions.

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Chemical

Redox

Dark

Light

When a plant was kept in darkness for many days, its leaves turnes yellow. Why?

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Leaves could not yet oxygen and so there was no photosynthesis

Leaves could not get light and so there was no respiration

Leaves could not get oxygen and so there was no respiration

Leaves could not get light and so there was no photosynthesis

How many kinds of organisms inhabit the earth?

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1 million

5 million

10 million

10 billion

When do the atria contract?

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Before diastole

After systole

During diastole

During systole

Kitab Al-Hayawan is the book of _____________

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Aristotle

Al Jahiz

Whittaker

Linnaeus

Lignin is present in:

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Primary wall

Secondary wall

None of above

Heart consists of ............ chambers.

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Two

Three

Four

Five

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