Biology Questions

Q:

The smallest blood vessels which are one-cell thick, are called ______

A) vena cava B) arteries
C) veins D) capillaries
 
Answer & Explanation Answer: D) capillaries

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Q:

What is the function of guard cells of stomata?

A) Opening of stomata only B) Closing of stomata only
C) Both opening and closing of stomata D) Neither opening nor closing of stomata
 
Answer & Explanation Answer: C) Both opening and closing of stomata

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Q:

Which drug is used as an Anti-Inflammatory?

A) Metformin B) Diazepam
C) Latanoprost D) Prednisone
 
Answer & Explanation Answer: D) Prednisone

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Q:

The female sex organs in a flower is the __________.

A) Zoospores B) stamen
C) pistil D) Chlorophyceae
 
Answer & Explanation Answer: C) pistil

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Q:

Which of the following induces nitrogen fixation in soil?

A) Protozoa B) Bacteria
C) Fungi D) Algae
 
Answer & Explanation Answer: B) Bacteria

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Q:

Which of the following bacterium causes crown gall disease in plants?

A) Bacillus thurigiensis B) Agrobacterium tumefaciens
C) Pseudomonas fluorescens D) None of these
 
Answer & Explanation Answer: B) Agrobacterium tumefaciens

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Q:

Which of the following glands is a source of the enzyme Ptyalin?

A) Pancreas B) Thyroid Gland
C) Pituitary Gland D) Salivary Glands
 
Answer & Explanation Answer: D) Salivary Glands

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Q:

Which of the following animals do NOT belong to the class of reptiles?

A) Crocodile B) Snake
C) Toad D) Turtle
 
Answer & Explanation Answer: C) Toad

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