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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You're on a roll — Step 1: Answer Question 3(a). (a) Three reasons why clayey soil is not suitable for cultivating many crops are: Poor drainage:* Clay soil has very small particles and tiny pore spaces, leading to slow water drainage and waterlogging, which can suffocate plant roots. Poor aeration:* The dense structure of clay soil limits air circulation, reducing oxygen availability for root respiration. Hardens when dry:* Clay soil becomes very hard and compact when dry, making it difficult for roots to penetrate and for cultivation. Step 2: Answer Question 3(b). (b) (i) An electromagnet* is a temporary magnet created when an electric