5
Answer: BSet 2: Inferences
Explanation
PASSAGE
The Venus flytrap is a carnivorous plant that captures insects using trigger hairs on its leaves. When an insect touches two hairs within 20 seconds, the trap snaps shut. This 'counting' mechanism prevents the plant from wasting energy closing on raindrops or debris.
What can be inferred about the Venus flytrap's trigger mechanism?
A. It responds to any single touch on its leaves.
B. It is an adaptation to conserve energy by avoiding false alarms.✓ Correct
C. It requires exactly three touches to close.
D. It only works in tropical climates.
Detailed Explanation
The 'counting' prevents closing on raindrops—avoiding wasted energy. This is explicitly stated as the function of the two-touch requirement.
Key Evidence:
• "prevents the plant from wasting energy"
• "closing on raindrops or debris"
Why others are wrong: A (It requires two touches, not one.), C (Two touches are needed, not three.), D (Climate isn't discussed.).