Biology Questions

Q:

Sponges belongs to the phylum

A) Protozoa B) Annelida
C) Porifera D) Cnidaria
 
Answer & Explanation Answer: C) Porifera

Explanation:
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Q:

Most viruses that infect plants possess

A) single-stranded DNA B) single-stranded RNA
C) double-stranded DNA and RNA D) double-stranded RNA only
 
Answer & Explanation Answer: B) single-stranded RNA

Explanation:

Generally viruses that infect plants have single stranded RNA. Viruses infecting animals have double stranded RNA or DNA. Viruses which infect bacteria have double stranded DNA.

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Q:

Which of the following micro-organism causes diseases like polio and chicken pox?

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

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Q:

What is the basis of first level of classification among plants?

A) Differentiated plant body B) Specialised tissues
C) Ability to bear seeds D) No option is correct
 
Answer & Explanation Answer: A) Differentiated plant body

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Q:

Which of the following is induced by Oncogene?

A) Polio B) Cancer
C) Diarrhoea D) Dengue
 
Answer & Explanation Answer: B) Cancer

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Q:

Which of the following is responsible for transport of food and other substances in plants?

A) Xylem B) Phloem
C) Chloroplast D) None of these
 
Answer & Explanation Answer: B) Phloem

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Q:

Haematopoiesis take place in _____.

A) Lungs B) Pancreas
C) Liver D) Bone marrow
 
Answer & Explanation Answer: D) Bone marrow

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Q:

Epidermal cells of which part of plant often secrete a waxy water resistant layer on their outer surface

 

A) Aerial parts only B) Roots only
C) Both aerial parts and roots D) Neither aerial parts nor root
 
Answer & Explanation Answer: A) Aerial parts only

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