Biology Practice Question and Answer

Q:

Which group of animals are named because of their spiny skin and a peculiar water-driven tube system that they use for moving around?

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  • 1
    Hemichordata 
    Correct
    Wrong
  • 2
    Aschelminthes 
    Correct
    Wrong
  • 3
    Echinodermata 
    Correct
    Wrong
  • 4
    Mollusca 
    Correct
    Wrong
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Answer : 3. "Echinodermata "
Explanation :

1. All the creatures of Echinodermata phylum are marine and have thorny bodies.

2. There is a mass flow system in their body.

3. A specific water-conveying canal system is found, which helps in their movement.

Q:

______ is caused when a child’s growing bones fail to develop due to a lack of vitamin D.

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  • 1
    Night blindness
    Correct
    Wrong
  • 2
    Rickets
    Correct
    Wrong
  • 3
    Goitre
    Correct
    Wrong
  • 4
    Scurvy
    Correct
    Wrong
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Answer : 2. "Rickets"
Explanation :

1. Rickets occurs when a child's growing bones do not develop due to vitamin D deficiency.

2. Vitamin D is an essential nutrient that helps in the absorption of calcium and phosphate.

3. Symptoms of rickets include.

- Pain and tenderness in the bones of the feet and hands

- curvature in the bones of the legs

- pain in shoulders and hips

- muscle weakness

- delayed development

Q:

What is the loss of bone density and strength known as?

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  • 1
    Osteoporosis
    Correct
    Wrong
  • 2
    Acromegaly
    Correct
    Wrong
  • 3
    Fibrous dysplasia
    Correct
    Wrong
  • 4
    Fracture
    Correct
    Wrong
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Answer : 1. "Osteoporosis"
Explanation :

1. Decrease in bone density and strength is called osteoporosis.

2. Osteoporosis is a condition in which bones become weak and brittle.

3. Women suffer from osteoporosis more often than men.

Q:

Which of the following is NOT a type of blood cell made by the bone marrow?

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  • 1
    Osteoclasts
    Correct
    Wrong
  • 2
    Red blood cells
    Correct
    Wrong
  • 3
    Platelets
    Correct
    Wrong
  • 4
    White blood cells
    Correct
    Wrong
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Answer : 1. "Osteoclasts"
Explanation :

1. There are three types of blood cells made by the bone marrow: red blood cells, white blood cells, and platelets.

2. Red blood cells carry oxygen and carbon dioxide around the body. White blood cells fight infection. Platelets help form blood clots.

3. Bone marrow is a tissue located in the hollow interior of long bones.

Q:

Which is the smallest bone in the human body?

338 0

  • 1
    Stapes
    Correct
    Wrong
  • 2
    Phalanges
    Correct
    Wrong
  • 3
    Humerus
    Correct
    Wrong
  • 4
    Pelvis
    Correct
    Wrong
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Answer : 1. "Stapes"
Explanation :

1. The smallest bone in the human body is the stapes.

2. This bone is located in the middle ear.

3. The length of the stapes is about 3 millimeters.

Q:

Which is a specialised excretory cell found in Platyhelminthes that acts like a kidney, removing waste material through filtration?

363 0

  • 1
    Fat cell
    Correct
    Wrong
  • 2
    Flame cell
    Correct
    Wrong
  • 3
    Stem cell
    Correct
    Wrong
  • 4
    Sponge cell
    Correct
    Wrong
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Answer : 2. "Flame cell"
Explanation :

1. Which is a special excretory cell found in Platyhelminthes which acts like a kidney, and the flame cell does the work of removing waste material through filtration?

Q:

Which of the following factors is responsible for the disease called 'Mad Hatter's Disease'?

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  • 1
    Inhalation of iron dust
    Correct
    Wrong
  • 2
    Inhaling silica dust
    Correct
    Wrong
  • 3
    Mercury poisoning
    Correct
    Wrong
  • 4
    Vitamin-D deficiency
    Correct
    Wrong
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Answer : 3. "Mercury poisoning"
Explanation :

1. Mercury poisoning is responsible for which of the following diseases called 'Mad Hatter's Disease'?

2. Mad Hatter's Disease is a form of mercury poisoning that affects the brain and nervous system.

3. There is a risk of mental and behavioural changes, such as confusion, hallucination, and irritability etc. in this disease.

Q:

Which of the following body parts is directly affected in the disease called rickets?

409 0

  • 1
    Eyes
    Correct
    Wrong
  • 2
    Tongue
    Correct
    Wrong
  • 3
    Spleen
    Correct
    Wrong
  • 4
    Bones
    Correct
    Wrong
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Answer : 4. "Bones"
Explanation :

1. Rickets is a bone disease caused by vitamin D deficiency.

2. Due to rickets, the absorption of calcium and phosphorus in the bones decreases.

3. The solution to protect exclusively breastfed babies from this disease is Vitamin D supplements.

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