Excretion — Homi Bhabha Exam Biology MCQs with Solutions
Free Homi Bhabha Exam Biology Excretion MCQs with step-by-step solutions (7 questions). Part of Life Processes. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Excretion · medium · theory
The process of removing harmful metabolic wastes from the body is called:
A. digestion
B. circulation
C. respiration
D. excretion ✓ Correct
Solution: Excretion removes toxic waste products of metabolism from the body.
Q2 — Excretion · medium · theory
The main excretory organs in human beings are the:
A. lungs
B. kidneys ✓ Correct
C. intestines
D. liver
Solution: The kidneys filter the blood and remove waste as urine.
Q3 — Excretion · hard · theory
The functional (structural) unit of the kidney is the:
A. neuron
B. nephron ✓ Correct
C. alveolus
D. nephridium
Solution: Each kidney contains about a million nephrons that filter the blood and form urine.
Q4 — Excretion · medium · theory
The main nitrogenous waste excreted in human urine is:
A. glucose
B. starch
C. urea ✓ Correct
D. proteins
Solution: Urea, formed in the liver from excess amino acids, is the chief nitrogenous waste in urine.
Q5 — Excretion · hard · theory
Which organ, besides the kidneys, helps in excretion by removing carbon dioxide?
A. pancreas
B. lungs ✓ Correct
C. heart
D. stomach
Solution: The lungs excrete carbon dioxide (and some water vapour) during breathing.
Q6 — Excretion · medium · theory
The tube that carries urine from the kidney to the urinary bladder is the:
A. urethra
B. nephron
C. artery
D. ureter ✓ Correct
Solution: The ureter carries urine from each kidney to the bladder; the urethra removes it from the body.
Q7 — Excretion · hard · theory
Plants get rid of some waste products by:
A. urinating
B. shedding leaves and storing wastes in cells ✓ Correct
C. sweating like animals
D. using kidneys
Solution: Plants excrete wastes by shedding leaves/bark, releasing gases through stomata, and storing wastes in cells or resins.