3.1. Diffusion and osmosis
A subsection of Biology, 5090, through 3. Movement into and out of cells
Listing 10 of 149 questions
Fig. 1 shows a leaf immediately after falling from a growing plant. Fig. 2 shows a leaf from the same plant several months after falling from the plant onto the soil below. Fig. 1 Fig. 2 Name the process that has taken place to cause the leaf in Fig. 2 to appear different from that in Fig. 1. Explain how named types of microorganism have carried out this process. Explain how the plant benefits from this process taking place in the large number of leaves that fall from the plant onto the soil below.
5090_w18_qp_22
THEORY
2018
Paper 2, Variant 2
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shows a Siamese fighting fish that lives in fresh water. large colourful fin location of an organ that can be filled with atmospheric air shows the effect of changing pH on the solubility of oxygen in water. 6.0 6.5 7.0 7.5 pH of water percentage solubility of oxygen in water 8.0 8.5 9.0 shows the effect of changing temperature on the solubility of oxygen in water. temperature of water / °C oxygen solubility in water / mg per dm3 Siamese fighting fish live in shallow water that can range in pH from 6.9 to 8.2 and in temperature from 15 °C to 40 °C. Use the information in and to explain how the conditions in which these fish live may be challenging. All fish have gills that provide a gas exchange surface in water. Siamese fighting fish also have an organ that has similar features to those of a human lung. These fish swim to the surface of water to take air from the atmosphere into this organ. Explain the advantage to Siamese fighting fish of also having this organ. Siamese fighting fish have 42 chromosomes in each diploid cell. State each of the following. the named structure in each diploid cell that contains the chromosomes the type of nuclear division that produces gametes the number of chromosomes in each gamete of the Siamese fighting fish. The dramatic shape and colour of Siamese fighting fish are produced by selective breeding. Suggest how the process of selective breeding in Siamese fighting fish can be used to produce these desirable features.
5090_w23_qp_22
THEORY
2023
Paper 2, Variant 2
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Questions Discovered
149