A student compares fish, frog, pigeon, and rabbit skeletons in a practical. The best general conclusion is that vertebrate skeletons are modified according to:
Correct Answer: A. Habitat and mode of locomotion
MCQ Collection
Animal Form and Function-I MCQs
Practice Animal Form and Function-I questions with answers and explanations.
When a freshwater mussel closes its valves during handling, the response protects the animal mainly from:
Correct Answer: A. Predation and desiccation
A sensory neuron carries information from a skin receptor to the spinal cord. If this neuron is cut, the animal will most directly lose:
Correct Answer: A. Sensory input from that region
A fish swims in a school and keeps distance from nearby fish even in cloudy water. The sensory system most responsible is:
Correct Answer: A. Lateral line detection of water movement
A student observes that taste receptors work only when food chemicals dissolve in saliva. This illustrates that gustation depends on:
Correct Answer: A. Chemical molecules reaching receptor cells
A pupil reflex becomes weak after damage to the optic nerve. The problem is mainly failure of:
Correct Answer: A. Transmission of visual sensory information
A student injects adrenaline into an experimental animal and observes rapid heart rate increase. This shows adrenaline can act on:
Correct Answer: A. Target cells of the cardiovascular system
In an endocrine feedback example, high blood glucose stimulates insulin, and insulin lowers blood glucose. This is best described as:
Correct Answer: A. Negative feedback maintaining homeostasis
A developing insect stops remaining larval and begins metamorphosis when juvenile hormone level falls. This shows juvenile hormone mainly controls:
Correct Answer: A. The nature of the molt
If capillary walls become excessively leaky during inflammation, the visible result may be:
Correct Answer: A. Swelling due to fluid leaving blood
A fish and a mammal both transport oxygen, but the mammal uses double circulation. The key advantage of double circulation is:
Correct Answer: A. Higher systemic pressure after lung oxygenation
An animal loses too much blood after injury. The most immediate threat is:
Correct Answer: A. Reduced oxygen delivery and blood pressure