Welcome to you Biology Quiz - Section 3

Name

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1. Plants that grow in saline water are called

A) halophytes

B) hydrophytes

C) mesophytes

D) thallophytes

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2. Pyorrhoea is a disease of the

A) nose

B) gums

C) heart

D) All of the above

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3. O2 released in the process of photosynthesis comes from

A) CO2

B) water

C) sugar

D) pyruvic acid

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4. Placenta is the structure formed

A) by the union of foetal and uterine tissue

B) by foetus only

C) by fusion of germ layers

D) None of these

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5. Plants hormone that induces cell division is

A) auxins

B) gibberellins

C) kinins

D) domins

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6. Neurospora is used as genetic material because

A) it has short life cycle of 10 days

B) the product of single meiosis can be easily analysed

C) meiotic products are linearly arranged in the form of ordered tetrads

D) is a diploid fungus

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7. Phloem is a tissue found in

A) reproductive organs of animals

B) plants

C) insects

D) mammals

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8. N2 content is kept constant in the biosphere due to

A) N2 fixation

B) industrial pollution

C) nitrogen cycle

D) absorption of N2

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9. out of proteins, lipids and carbohydrates present in a cell membrane, what is true?

A) Lipids are maximum

B) Carbohydrates are minimum

C) Carbohydrates are maximum

D) All three are in equal proportion

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10. Other than spreading malaria, anopheles mosquitoes are also vectors of

A) dengue fever

B) filariasis

C) encephalitis

D) yellow fever

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