Question # 1

Prior to cell division, each chromosome replicates or duplicates its genetic material. The products are connected by a centromere and are called:

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Sister chromosomes

Homologous Chromosomes

Non-sister chromatids

Sister chromatids

Water makes the compositon of protoplasm of all living organisms

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50-60%

60-70%

60-80%

60-90%

Closely related genera are grouped into ____________

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Family

Species

Order

Phyla

"Omins Cellula e Cellula" is said by:

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Schleiden

Schwann

Dolland

RudolF Virchow

The plasma membrane does all of these except ________

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Contains the hereditary material

Acts as a boundary or border for the cytoplasm

Regulates passages of material in and out of the cell

Functions in the recognition of cell

On what basis, organisms have been classified by biologists?

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Similarities

Differences

Both a and b

Randomly

Number of discovered enzymes are:

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200

2000

3000

3500

Forests are the source of:

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Drugs

Fuel

Timber

All of these

The study of Insects called.

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Taxanomy

Entomology

pharmacology

Biotechnology

The double membrane enveloped of chloroplast surrounds a large ventral space called ............ .

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Strome

Grana

Intergrane

Thylakoid

A gardner sees a large snake nearby. He knows that generally snakes sting, so the gardener ran away. The gardener did which of the following?

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Used reasoning

Used observation

Constructed a theory

Tested a hypothesis

Which of these material is not a component of the plasma membrane?

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Lipids

Carbohydrates

Proteins

DNA

How many children born in each each minute in the world?

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100

150

180

200

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