Question # 1

Which event distinguishes meiosis from mitosis?

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Condensation of chromosomes

Loss of the nuclear membrane

Formation of metaphase plate

Pairing of homologous chromosomes

Members of the same species living in the same place is called:

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Habitat

Biosphere

Community

Population

Type of spindle fibre which attaches the chromosomes is called:

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Kinetochore

Non Kinetochore

Bot a and b

Centromere

Enzymatic reactions are _______ of times faster than uncatalyzed reactions:

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Millions

Hundreds

Thousands

Billion

It is a group of related phyla:

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Kingdom

Class

Order

Family

The microscopic study of tissues is called.

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Physialogy

Morphology

Histology

Entomology

When do the atria contract?

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Before diastole

After systole

During diastole

During systole

At ..............°C the process of photosynthesis stops.

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20°C

30°C

25°C

45°cC

Down's sayndrome is an autosomal non-disjunction of chromosomes number ............. .

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22

12

21

14

Phylums are grouped into _____________

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Phylum

Order

Class

Kingdom

Cytokinesis in animals take place by:

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Furrow

Phragmoplast

Telophase

None of these

Arteries can be divided into ........... types.

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Two

Three

Four

Five

The thin extensions of the inner mitochondrial membrane are known as __________

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Cristae

Matrix

Thylakoids

Stroma

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