Question

Pick the odd one out and justify:
a. Nose, brain, trachea, lungs.
b. Sclerenchyma, parenchyma, epithelial, collenchyma
c. Nerve cells, bone cells, brain cells, meristem cells.

Answer 1

brain

bone cell

epithelial

Answer 2

Answer:

The odd one is nose, brain, trachea, lungs.

Explanation:

a. Nose, brain, trachea, lungs

Nose, trachea and lungs are the organs of human respiratory system but brain is an important organ of human nervous system.

• The nose opens in two nostrils and helps to filter dust from air, makes air moist and passes the inhaled air into the trachea.
• The trachea is a tube made up of rings containing pharynx and larynx. Through the pharynx, air passes through the bronchi into the lungs.
• Lungs are two pairs containing alveoli. Each alveolus is surrounded with blood capillaries with blood cells in it. RBC found in capillaries helps in exchange of oxygen and carbondioxide.
• The brain has billions of neurons that helps to transmit the impulses. It also has a fluid in it called cerebrospinal fluid that protects the brain from external shock.

b. Sclerenchyma, parenchyma, epithelial, collenchyma

• All are the types of tissues found in living beings.
• Sclerenchyma, parenchyma amd collenchyma are plant tissues whereas epithelial tissue is found in animals.
• They help in manufacturing food, storage of food and giving mechanical strength in plants.
• Epithelial tissue covers all body surfaces and helps in protection, secretion, absorption, etc.

c. Nerve cells, bone cells, brain cells, meristem cells.

• All are the cells of living beings.
• Nerve and bone cells are form nervous system, bone cells form skeletal system.
• Meristem cells form meristematic tissues found in apical part of plants.