▶️ Answer/Explanation
Correct Option: B
By observing the flow of the diagram, we can identify the specific biological functions occurring at each label:
1. Identification of Arrow $P$ (Nutrition):
This arrow represents the intake of energy and materials. We see $P$ moving from the atmosphere into the plant (photosynthesis) and from the plant into the chicken (feeding). Both are forms of nutrition.
2. Identification of Arrow $Q$ (Excretion):
This arrow tracks the removal of substances from the organisms. It leads directly to “waste products” and shows the release of $CO_2$ from the chicken. The removal of metabolic waste is the definition of excretion.
Summary:
Since $P$ involves taking in nutrients and $Q$ involves getting rid of waste, option B is the only logical choice.
▶️ Answer/Explanation
The description highlights three distinct life processes. First, the plant must detect the insect landing on the leaf, which demonstrates sensitivity (response to stimuli). Second, the leaf “folds very quickly,” which is a clear example of movement. Finally, the production of enzymes to digest the insect implies the process of obtaining food for energy, known as nutrition. Excretion and growth are not explicitly described in this immediate reaction.
✅ Answer: (D)
✅ Answer: (D)
▶️ Answer/Explanation
Sensitivity (also known as irritability) is the ability of an organism to detect or sense stimuli in the internal or external environment and to make appropriate responses. In this scenario, the sight of the carnivore acts as a stimulus. The herbivore perceives this threat through its sensory organs and will typically respond by fleeing or hiding to ensure survival. Other options like excretion, growth, and reproduction describe internal biological maintenance or life cycle stages rather than immediate environmental interaction.
✅ Answer: (D)
✅ Answer: (D)