Biology Questions

Q:

__________ are made up of sclerenchymatous cells. These are generally absent in the primary phloem but are found in the secondary phloem.

A) Xylem fibres B) Xylem parenchyma
C) Phloem parenchyma D) Phloem fibres
 
Answer & Explanation Answer: D) Phloem fibres

Explanation:
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Q:

A multicellular organism grows by ____________.

A) Cell addition B) Cell explosion
C) Cell implosion D) Cell division
 
Answer & Explanation Answer: D) Cell division

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Q:

Which of the following is not true of graded potentials?

A) They can form on receptor endings B) They increase amplitude as they move away from the stimulus point
C) They are short-lived D) They can be called postsynaptic potentials
 
Answer & Explanation Answer: B) They increase amplitude as they move away from the stimulus point

Explanation:

Graded potentials are changes in membrane potential that vary in size, as opposed to being all-or-none.

 

In the given options, They increase amplitude as they move away from the stimulus point is not true about the graded potentials.

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Q:

Blood is red in colour due to the presence of __________

A) Cytochrome B) Chlorophyll
C) Hemocyanin D) Haemoglobin
 
Answer & Explanation Answer: D) Haemoglobin

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Q:

Night Blindness is caused by deficiency of which of the following Vitamin?

A) Vitamin B B) Vitamin C
C) Vitamin K D) Vitamin A
 
Answer & Explanation Answer: D) Vitamin A

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Q:

Which is the only one example of Mollusca Phylum?

A) Locust B) Butterfly
C) Scorpion D) Octopus
 
Answer & Explanation Answer: D) Octopus

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Q:

The secretion from the prostate gland enters into the:

A) Kidney B) Ureter
C) Urethra D) Testis
 
Answer & Explanation Answer: C) Urethra

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Q:

Which blood group is called universal donor?

A) AB- B) O-
C) AB+ D) O+
 
Answer & Explanation Answer: B) O-

Explanation:

O- blood group is called universal donor. AB+ is called as universal acceptor.

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