Biology Questions

Q:

In animals like Annelids, Molluscs, organs have associated to form functional systems, each system concerned with a specific physiological function. This pattern is called ________ system level of organization.

A) organ B) open
C) closed D) coelom
 
Answer & Explanation Answer: A) organ

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Q:

Vocal chords in women are _______________ than vocal chords in men.

A) 5mm shorter B) 15mm shorter
C) 5mm longer D) 15mm longer
 
Answer & Explanation Answer: A) 5mm shorter

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Q:

Which of the following is not a plant hormone?

A) Gibberellic B) Auxins
C) Cytokinins D) Thyroxin
 
Answer & Explanation Answer: D) Thyroxin

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Q:

Which of the following relation is true regarding the amounts of genetic material contributed by the father and mother to the child?

A) Father >> Mother B) Father << Mother
C) Father = Mother D) No relation can be determined
 
Answer & Explanation Answer: C) Father = Mother

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Q:

Molecular clocks are based on the idea that _____.

A) On average neutral mutations arise at a constant rate B) Directional selection occurs at a constant rate
C) Mutations occur once every generation D) Molecules resonate at a certain frequency that can be measured
 
Answer & Explanation Answer: C) Mutations occur once every generation

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Q:

Among plants, three different genera Solanum, Petunia and Datura are placed in which family?

A) Cancidae B) Solanaceae
C) Felis D) Felidae
 
Answer & Explanation Answer: B) Solanaceae

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Q:

___________ being a higher category, is the assemblage of families which exhibit a few similar characters.

A) Order B) Species
C) Genus D) Class
 
Answer & Explanation Answer: A) Order

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Q:

Why do the desert plants take up the carbon dioxide for photosynthesis at night?

A) To prevent water loss B) To enhance carbon absorption
C) To release excess oxygen D) No option is correct
 
Answer & Explanation Answer: A) To prevent water loss

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