Biology > QUESTION PAPER (QP) > OCR AS LEVEL BIOLOGY A H020/01 Breadth in Biology Question Paper October 2021 (All)

OCR AS LEVEL BIOLOGY A H020/01 Breadth in Biology Question Paper October 2021

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ou should spend a maximum of 25 minutes on this section. Write your answer for each question in the box provided. Answer all the questions. 1 Which of the options, A to D, describes the role of CIT... ES? A making conservation a part of normal farming practices B restricting the trade in individuals of endangered species C stopping the movement of endangered species D requiring countries to develop strategies for sustainable development Your answer [1] 2 Which of the options, A to D, would result in the formation of tissue fluid? A hydrostatic pressure 1 oncotic pressure B hydrostatic pressure = oncotic pressure C oncotic pressure 1 hydrostatic pressure D oncotic pressure H hydrostatic pressure Your answer [1] 3 Which of the options, A to D, on the diagram below shows the time at which the SAN sends out a wave of excitation to initiate a heartbeat? 0 Time(s) Left ventricle Left atrium Aorta 5 A B C D 10 15 Pressure (kPa) 20 Your answer [1] 3 Turn over 4 The sounds of the heartbeat due to heart valves closing can be described as ‘lub-dub’. The ‘lub’ sound occurs at the beginning of ventricular systole. Which of the options, A to D, describes what is happening when the ‘lub’ sound is heard? A semilunar valves opening and blood entering the ventricles B semilunar valves closing and blood entering the ventricles [Show More]

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