This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
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Here are the solutions to questions c) and d): c) Fig. 1(c) is an illustration of different animals. Study the illustration carefully and answer the questions that follow. i. State the class in which the animals belong to. Animals A (Goat), C (Cat), D (Dog), and E (Sheep) belong to the class Mammalia. Animal B (Turkey) belongs to the class Aves. ii. Name the animals labelled A, B, C, D, and E. A: Goat* B: Turkey* C: Cat* D: Dog* E: Sheep* iii. Give one breed each of animal labelled A, C, and E. A (Goat): Boer* C (Cat): Persian* E (Sheep): Merino* d) Fig. 1(d) is an illustration of an electronic circuit connected by a group of students. Study the illustration carefully and answer the questions that follow. i. Name each of the parts labelled A, B, C, D and F. A: Resistor* B: Capacitor* C: Switch* D: Cell / Battery* F: Light Emitting Diode (LED)* ii. Which of the labelled part(s) regulates the flow of current? A (Resistor) primarily regulates the magnitude of current flow. C (Switch) regulates current flow by opening or closing the circuit. F (Light Emitting Diode) regulates current flow by allowing it in only one direction. iii. State what would be observed on component F when component C is closed. When component C (the switch) is closed, component F (the LED) would light up or emit light, assuming it is correctly biased. iv. Give one function of the component labelled B. Component B (Capacitor) stores electrical energy in an electric field. v. State one main difference between component F and (P-N junction) diode. Component F (Light Emitting Diode) emits visible light when forward biased, whereas a standard P-N junction diode does not emit visible light.