An animal with a hard external covering gains protection but faces a special growth problem. The problem is solved by:
Correct Answer: A. Molting
MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
A researcher observes that aquatic larvae use cilia to create feeding currents. The cilia are helping with:
Correct Answer: A. Movement of water and food particles
A laboratory note says “study of adaptations of skeletons to their function must be done.” The best matching principle is:
Correct Answer: A. Structure reflects mechanical demand
A shark skeleton differs from a typical bony fish because it is mainly:
Correct Answer: A. Cartilaginous
During a dissection, tendons appear pale and tough. Their composition makes them suitable for:
Correct Answer: A. Strong force transmission
A student asks why large land animals usually need strong skeletons. The best answer is that gravity requires:
Correct Answer: A. Mechanical support for body mass
A neuron receives a weak stimulus through its dendrites and sends an impulse along a long fiber. The long conducting fiber is the:
Correct Answer: A. Axon
A bivalve shell is thick and calcareous. In functional terms, it mainly provides:
Correct Answer: A. Protection and muscle attachment
A fish skeleton contains many flexible joints and fins. This organization is best suited for:
Correct Answer: A. Aquatic locomotion and body support
A frog jumps powerfully from a stationary position. The functional adaptation most directly involved is:
Correct Answer: A. Strong hind limb musculature and skeletal levers
A bird wing skeleton is light but strong. This design is useful because it:
Correct Answer: A. Reduces body mass while maintaining support for flight
If calcium availability is very low during vertebrate development, the structure most directly affected would be:
Correct Answer: A. Mineralized bone strength