IB myp 4-5 Biology – Practice Questions- All Topics
Topic :Interaction with environment-Senses
Topic :Interaction with environment– Weightage : 21 %
All Questions for Topic : Tropism,Senses,Nervous System,Receptors and hormones
Question:
Discuss the reasons for the main sense organs being located in the head.
▶️Answer/Explanation
Ans: Anterior/highest/most protruding part of body; close to mouth; sense organs can be grouped together in the ideal position for sensation; short distance for impulses to pass from sense organs to brain/CNS/cerebral ganglia.
Question:
Suggest disadvantages of sense organs being located elsewhere in the body.
▶️Answer/Explanation
Ans: Longer distance for impulses to travel to brain/ CNS/cerebral ganglia; less useful for coordinating eating/ingestion; further from eye/other sense organs so not as easy to combine sensory inputs.
Question:
Rods and cones are useful at different times. When are rods and cones most useful?
▶️Answer/Explanation
Ans: Rods are most useful in dim light; at dawn and dusk; at night; cones are most useful in bright light; most useful for producing detailed/high definition images.