0610_w15_qp_23
A paper of Biology, 0610
Questions:
9
Year:
2015
Paper:
2
Variant:
3
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1
shows five different mammals. % & ' ( $ not drawn to scale Use the key to identify the mammals shown in . Write the letter of each species (A to E) in the correct box beside the key. key letter has webbed feet go to 2 does not have webbed feet go to 3 tail wide and flattened Castor canadensis tail rounded, ending in a point Lutra lutra body fur striped Panthera tigris body fur not striped go to 4 tail has tuft of dark fur at the end Panthera leo no tuft of fur at end of tail Canis lupus
1. Characteristics and classification of living organisms  →  1.3. Features of organisms
20. Human influences on ecosystems  →  20.4. Conservation
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2
Define the term transpiration. shows four leaves from the same tree. ) * + - leaf eaten by insect Suggest which leaf will transpire most rapidly and give a reason for your answer. leaf reason shows a healthy plant during an investigation into transpiration. It was kept in the same environment, apart from the light changing, during 24 hours. The mass of the plant and pot was measured at the start, after 12 hours in the light and after a further 12 hours in the dark. 2.50 kg plastic bag 2.30 kg plastic bag 2.25 kg plastic bag at the start after 12 hours in the light after a further 12 hours in the dark Describe the results of the investigation shown in . Suggest and explain why the plant pot was enclosed in a plastic bag for this investigation. State two environmental factors, other than light, that would change the rate of transpiration in the plant shown in .
8. Transport in plants  →  8.3. Transpiration
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5
The boxes on the left contain some biological terms. The boxes on the right contain descriptions of these biological terms. Draw one straight line to join each term with its description. Draw only six lines. One has been done for you. biological term description translocation movement of sucrose and amino acids in phloem assimilation removal from organisms of toxic materials, waste products of metabolism and substances in excess excretion movement of digested food into a cell where it becomes part of the cell nutrition diffusion of water through a partially permeable membrane ingestion chemical reaction that breaks down nutrient molecules to release energy osmosis taking in, absorbing and using substances for growth and repair of the body respiration taking in food through the mouth
1. Characteristics and classification of living organisms  →  1.1. Characteristics of living organisms
7. Human nutrition  →  7.2. Digestive system
8. Transport in plants  →  8.4. Translocation
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7
shows a diagram of a section through the heart. V T S R Identify the structures labelled R, S and T on . Write your answers on . Suggest why the wall of chamber T is thicker than the wall of chamber V, as shown on . The heart creates and maintains a one-way flow of blood around the body. Describe how the heart does this. shows part of the circulatory system. lungs kidneys intestines liver     blood takes a long time to clot becomes exhausted quickly during exercise.
9. Transport in animals  →  9.2. Heart
9. Transport in animals  →  9.1. Circulatory systems
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8
Choose words from the list to complete the sentences. Each word may be used once, more than once or not at all. accommodation brain vasoconstriction diffusion vasodilation evaporation heart homeostasis saliva sweat tears The skin helps to keep the body temperature constant. This is part of the process called . Control of body temperature is coordinated by the . If the temperature of the blood rises above normal, the body responds by of the blood vessels near the surface of the skin. Some glands in the skin also produce which helps cool the body by .
14. Coordination and response  →  14.4. Homeostasis
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9
Define the term population. State three factors that can affect the size of a population. shows the growth curve of a colony of bacteria living in an environment with limited resources. time / days number of bacteria Name the parts of the graph on that are labelled Q and R. Q R Describe and explain what is happening in the section of the graph labelled S on . shows the world population for humans. year human population / billions State three ways in which this graph is different to the graph of the bacterial population in .
19. Organisms and their environment  →  19.4. Populations
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