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 Biology Questions

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Q:

The biogenetic law was proposed by

A) Alfred Russel Wallace B) Charles Darwin
C) Ernst von Haeckel D) Lamarck
 
Answer & Explanation Answer: C) Ernst von Haeckel

Explanation:

The biogenetic law states that ontogeny (study of development) repeats phylogeny (origin from previous group of racial history), The young one of the frog namely the tadpole is like a fish cosidered to be ancestral to frog.

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Q:

Most bacteria reproduce by

A) budding B) binary fission
C) fragmentation D) mitosis
 
Answer & Explanation Answer: B) binary fission

Explanation:

Most bacteria is reproduce by binary fission.

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4 4120
Q:

What is the basis of classifying various plant tissues as meristematic tissue and permanent tissue?

 

A) Size B) Dividing capacity
C) Location D) No option is correct
 
Answer & Explanation Answer: B) Dividing capacity

Explanation:
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0 4102
Q:

The universal donor belongs to blood group

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

Explanation:

The persons with 'O' blood group do not have antigens in the red corpuscles. So that blood will not cause agglutination of corpuscles if mixed with any type of blood. So group 'O' persons are called universal donors.

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Q:

The major centre to receive, analyze and integrate information in body is

A) Heart B) Kidney
C) Pituitary D) Brain
 
Answer & Explanation Answer: D) Brain

Explanation:
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4 4096
Q:

Select the correct statement about the Heart Valves.

A) Aortic and pulmonary valves control the flow of blood into the heart. B) The AV valves are supported by chordae tendineae so that regurgitation of blood into the atria during ventricular contraction does not occur.
C) The tricuspid valve divides the left atrium from the left ventricle. D) The mitral valve separates the right atrium from the right ventricle.
 
Answer & Explanation Answer: B) The AV valves are supported by chordae tendineae so that regurgitation of blood into the atria during ventricular contraction does not occur.

Explanation:

The correct statement from the given options is

The AV valves are supported by chordae tendineae so that regurgitation of blood into the atria during ventricular contraction does not occur.

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8 4090
Q:

What is a direct result of aerobic respiration?

A) The enzymes for anaerobic respiration are produced and stored in lysosomes B) Alcohol is produced by yeast and bacteria
C) The potential energy of glucose is transferred to ATP molecules D) Lactic acid is produced in muscle tissue
 
Answer & Explanation Answer: C) The potential energy of glucose is transferred to ATP molecules

Explanation:

Aerobic respiration is the reaction takes place in presence of oxygen which quite opposite to anerobic. The direct result of aerobic repiration is ATP molecules from breakdown of glucose molecules.

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4 4069
Q:

What is the structural unit of compact bone?

A) Osteon B) Spongy bone
C) Lamellae D) Periosteum
 
Answer & Explanation Answer: A) Osteon

Explanation:

what_is_the_structural_unit_of_compact_bone1536568861.jpg image

 

The structural unit of compact bone is Osteons or Haverisan systems.

 

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