AS & A Level Biology (9700) — October–November 2024, Paper 43
10 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Different species of animal have neurones with different characteristics. Fig. 1.1 is a diagram of a motor neurone of a rat and a motor neurone of a snail. The rat motor neurone…
Answer this question and get it marked →The leaves of many plants have stomata that show a regular daily rhythm of opening and closing over a period of 24 hours. Explain why it is important for plants to open and close…
Answer this question and get it marked →During aerobic respiration, cells respire substrates such as glucose to produce ATP. Some events that occur during aerobic respiration are: the respiratory substrate breaks down…
Answer this question and get it marked →The leaves of Mimosa pudica plants are made of a number of structures known as pinnae. The pinnae fold when the leaf is touched. This closes the leaf. Fig. 4.1 shows an open leaf…
Answer this question and get it marked →Lunularia cruciata is a primitive plant. Its body consists of a flattened sheet of photosynthetic tissue called a thallus. Fig. 5.1 shows L. cruciata with two different types of…
Answer this question and get it marked →The mammalian kidney is responsible for: the excretion of urea; osmoregulation (the homeostatic control of the water potential of the blood). Outline how and where the excretory…
Answer this question and get it marked →Spea multiplicata is one of several species of American spadefoot toad. Young spadefoot toads are called tadpoles and live in water in ponds. S. multiplicata tadpoles show three…
Answer this question and get it marked →Scientists use many different techniques in genetic engineering. Sometimes the gene for genetic engineering cannot be extracted from the donor organism. Instead, the gene is…
Answer this question and get it marked →Lichens are found growing on trees, walls, rocks and soil. Fig. 9.1 shows a lichen of the genus Usnea. Usnea can tolerate only low concentrations of sulfur dioxide and does not…
Answer this question and get it marked →Populations of the moth Biston betularia live in Europe and in North America. The most common phenotype on both continents is a pale wing colour with light-grey shading (the…
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