In a practical class, a student relates insect chitin to fish scales and bird feathers. The shared broad function is:
Correct Answer: A. Body protection
MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
A bird loses many feathers during molting. Until replacement, the most likely functional problem is:
Correct Answer: A. Reduced insulation or flight efficiency
An animal detects dissolved food chemicals in water. The receptor type most directly involved is:
Correct Answer: A. Chemoreceptor
A sperm cell moves toward an egg using a long whip-like structure. This example represents movement by:
Correct Answer: A. Flagellum
A reptile moves efficiently on land partly because its body covering reduces:
Correct Answer: A. Water loss
If an animal lacks a protective body covering, the immediate risk would most likely be:
Correct Answer: A. Injury, infection, and water imbalance
A zoology student compares mammalian hair and reptilian scales. Both are rich in:
Correct Answer: A. Keratin
A deep-sea fish senses faint light from bioluminescent organisms. The receptor type required is:
Correct Answer: A. Photoreceptor
In a vertebrate muscle fiber, contraction becomes impossible when actin and myosin interaction is blocked. This shows that movement depends on:
Correct Answer: A. Sliding filament mechanism
A student observes that mammalian sweat glands help cool the body. This is an example of the integument contributing to:
Correct Answer: A. Thermoregulation
A student sees a fish scale, bird feather, and mammalian hair in one practical. These are all examples of:
Correct Answer: A. Body covering adaptations
An animal with a shell can withdraw soft parts when disturbed. This behavior mainly uses shell as:
Correct Answer: A. Mechanical defense