Explain why organisms detect internal and external stimuli.

Assessment focus 154: Explain why organisms detect internal and external stimuli.. Explain why organisms detect internal and external stimuli. should be treated as a precise A-Level requirement, not a broad recall prompt. Subtopic anchor: Stimuli, both internal and external, are detected and lead to a response. Keep terminology exact by using organisms, detect, internal, external, stimuli; avoid replacing these terms with everyday wording that loses biological meaning. If the command word asks for evaluation, weigh the evidence before reaching a judgement instead of listing facts. Use the exact assessment boundary "Explain why organisms detect internal and external stimuli." when deciding what evidence belongs in the answer. Synoptic links may involve other A-Level Biology topics, but the answer should return to Response and homeostasis official content and the exact wording of this objective. Exam-ready responses define the relevant term, apply it to the named context, use organisms, detect, internal, external, stimuli accurately, and finish with the biological consequence or interpretation required by the question.