0610_w24_qp_32
A paper of Biology, 0610
Questions:
8
Year:
2024
Paper:
3
Variant:
2
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1
is a photomicrograph showing a cross‑section of an artery. On , identify and label the: • artery wall • lumen. Complete the table by circling the correct words to show the differences between arteries and veins. type of blood vessel relative thickness of the wall relative diameter of the lumen artery thick / thin wide / narrow vein thick / thin wide / narrow State the name of the structures in veins that ensure one‑way flow of blood. is a simplified diagram of the circulatory system in humans. organ A pulmonary vein aorta pulmonary artery vena cava renal vein renal artery organ B organ C other organs State the names of the organs represented by the letters A, B and C in . A B C Draw two arrows on to show the direction of blood flow in the pulmonary vein and the pulmonary artery. State the name of the blood vessels that transfer substances to and from cells. Circle the names of two waste substances that are transferred from cells to blood. amino acids carbon dioxide fatty acids glucose oxygen urea
9. Transport in animals  →  9.3. Blood vessels
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2
Tick (✓) all the boxes that describe enzymes. they are permanently changed by the reaction they are involved in all metabolic reactions they are proteins they are solvents they slow down all chemical reactions shows the effect of pH on the activity of three different digestive enzymes, X, Y and Z. pH enzyme activity X Y Z Using the information in : State the optimum pH of enzyme Z. State a pH value at which both enzymes X and Y are active. State a pH value at which enzyme Y is completely denatured. Enzyme X is a protease. Describe its location and action in the digestive system. location action Enzyme Y is produced by the salivary glands. State the substrate and product of enzyme Y. substrate product State the type of digestion that uses enzymes. State one factor, other than pH, that affects enzyme activity.
5. Enzymes  →  5.1. Enzymes
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3
is a diagram of part of the carbon cycle. Three processes that occur in the carbon cycle are labelled Q, R and S. Q S R carbon in the atmosphere carbon in dead organisms carbon in fossil fuels carbon in plants carbon in herbivores Complete the table by stating the names of processes Q, R and S in . letter in name of the process Q R S Draw one arrow on to represent the transfer of carbon by respiration in herbivores. Carbon dioxide is one gas that causes climate change. State the name of one other gas that causes climate change. Suggest one way that humans can increase the rate of removal of carbon dioxide from the atmosphere. Proteins contain carbon. State two other chemical elements all proteins contain. Describe what is meant by the term carnivore.
19. Organisms and their environment  →  19.3. Nutrient cycles
6. Plant nutrition  →  6.1. Photosynthesis
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4
A population of a species of fish was accidentally introduced into a lake. State two features that can be used to classify this introduced species as a fish. Describe what is meant by the term population. shows the changes in the population size of the introduced fish species in the lake between 2004 and 2010. year population size A B C The boxes on the left show the letters identifying the sections of the graph in . The boxes on the right show the phases of population growth. Draw lines to link each letter with the correct phase. Draw three lines. letter from A B C phase death exponential lag stationary Describe possible reasons for the change in population size between 2009 and 2010 in .
19. Organisms and their environment  →  19.4. Populations
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5
A student investigated the effect of windspeed on the rate of transpiration. The student placed a fan at different distances from a plant shoot and measured the distance the air bubble moved in three minutes. The distance the air bubble moved can be used to calculate the rate of water uptake, which is equivalent to the rate of transpiration. shows the apparatus the student used. ruler fan cut shoot reservoir capillary tube air bubble distance of the fan from the shoot beaker water Table 5.1 shows their results. Table 5.1 distance of the fan from the shoot / m distance travelled by the air bubble in three minutes / mm rate of water uptake / mm per second 0.3 0.14 0.4 0.14 0.5 0.13 0.6 0.7 0.11 0.8 0.09 Calculate the rate of water uptake when the fan is 0.6 m from the plant shoot. Give your answer to two decimal places. Space for working. mm per second Using the information in and Table 5.1, complete the sentences by writing a word or phrase in the spaces to describe the results. As the fan is moved further away from the shoot, the windspeed and the moved by the air bubble decreased. During transpiration water evaporates from the surfaces of the cells into the air spaces inside the leaf. The water vapour diffuses out of the leaf through the . This causes water to move through the capillary tube causing the air bubble to move towards . State one other factor that affects the rate of transpiration. State two uses of water in a plant. Explain why the leaf can be described as an organ.
8. Transport in plants  →  8.3. Transpiration
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6
is a photograph of intensive egg production on a chicken farm. In 1905, each chicken produced a mean of 120 eggs per year. In 2021, each chicken produced a mean of 300 eggs per year. Calculate the percentage increase in mean egg production per year. Space for working. % Egg production has increased due to selective breeding and intensive farming. Describe the disadvantages of intensive livestock farming. Complete the flowchart to describe how egg production in chickens is increased by selective breeding. identify the chickens that use these chickens to observe the offspring for improvement in egg production repeat this process over many Selective breeding is also used to increase crop plant production. State two other ways to increase crop plant production.
20. Human influences on ecosystems  →  20.1. Food supply
18. Variation and selection  →  18.3. Selection
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7
A scientist investigated the effect of the enzyme pectinase on the volume of fruit juice produced by the same mass of two different fruits. shows the results. volume of fruit juice produced / dm3 blackcurrant yellow plum type of fruit key without pectinase with pectinase Describe the results shown in . State two components of a balanced diet that are provided by fruits such as blackcurrants and plums. State two reasons why bacteria are useful in biotechnology and genetic modification. The box on the left contains the beginning of a sentence. The boxes on the right show some sentence endings. Draw two lines to make two correct sentences. Genetic modification can only be done in plants. changes the genetic material of an organism. inserts, changes or removes genes. involves sexual reproduction. is used in active transport.
21. Biotechnology and genetic modification  →  21.2. Biotechnology
21. Biotechnology and genetic modification  →  21.3. Genetic modification
21. Biotechnology and genetic modification  →  21.1. Biotechnology and genetic modification
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