0610_s15_qp_21
A paper of Biology, 0610
Questions:
9
Year:
2015
Paper:
2
Variant:
1
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2
Sometimes teeth develop dental decay. Describe how dental decay develops. Table 2.1 states three methods of caring for the teeth to prevent dental decay. Complete Table 2.1 by describing why each method is effective. Table 2.1 method of caring for the teeth description of why the method is effective brushing rinsing the mouth after eating not eating sweet foods between meals There are four types of teeth. State the functions of each of the following when food is being eaten. incisors canines premolars and molars Suggest how the tongue helps in the process of chewing. Describe two reasons why solid food is chewed before it is swallowed.
7. Human nutrition  →  7.3. Physical digestion
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3
shows the human respiratory system. On use label lines to identify: a bronchiole; the larynx; the trachea. shows: a group of alveoli and the capillaries surrounding them in a human lung; a section through this group of alveoli with most of the capillaries removed; a magnified section of part of the wall of an alveolus and its capillary. capillary magnified wall of alveoli cut open group of alveoli and capillaries surrounding them section through alveoli with most of the capillaries removed magnified section of the wall of an alveolus and its capillary air liquid film alveolus wall capillary wall red blood cell air out blood from pulmonary artery capillary alveolus blood to pulmonary vein air in Use to describe three features of gas exchange surfaces in animals. feature 1 feature 2 feature 3 In an investigation a student recorded the volume of air inspired in one minute. The measurement was taken while the student was resting and again when the student had run an 800 m race. The results are shown in Table 3.1. Table 3.1 volume of air inspired / dm3 per min before the race 5.80 at the end of the race 88.75 Calculate the increase in the volume of air inspired by the student at the end of the race. dm3 per min State two changes that the body makes to increase the volume of air inspired. Suggest one reason why the body needs more air during exercise.
11. Gas exchange in humans  →  11.1. Gas exchange in humans
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5
Define the following genetic terms. mutation heterozygous recessive allele People use sun-cream to protect their skin. Ultra-violet light from the sun is a type of ionising radiation. shows sun-cream being applied. Suggest how using sun-cream reduces the damaging effect of the Sun’s rays. shows the hand of a person who suffers from a mutation that results in people having more than five digits on each hand . The mutation that results in this condition is dominant. shows how the condition is inherited in a family. Q R P male female Key normal affected by polydactyly State the genotype of the individuals shown in . Use AA, Aa or aa. Write your answers in Table 5.1. Table 5.1 numbered person on genotype of person Using evidence from , state which of the couples, P, Q or R, provides proof that the mutation is not recessive. couple Explain the reason for your answer.
17. Inheritance  →  17.4. Monohybrid inheritance
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7
shows the relationships between some organisms in part of an ecosystem. tree aphid locust grass crow hawk eagle not drawn to scale Finches are another organism in this ecosystem. These birds eat the seeds that the tree produces, and the hawks and eagles eat the finches. Add this information to . Suggest and explain two changes that might occur if the eagles in this ecosystem died out. change explanation change explanation The boxes on the left contain the names of types of organisms found in a food web. The boxes on the right contain definitions of these types of organisms. Draw a line from each box on the left to the box on the right that states its definition. One example has been done for you. carnivore consumer decomposer herbivore producer an animal that gets its energy by eating other animals the position of an organism in a food chain, food web or pyramid of numbers, biomass or energy an animal that gets its energy from eating plants an organism that gets its energy from feeding on other organisms an organism that gets its energy from dead or waste organic matter an organism that makes its own organic nutrients, usually using energy from sunlight, through photosynthesis
19. Organisms and their environment  →  19.2. Food chains and food webs
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8
The digestive system produces enzymes. Define the term enzyme. shows how the reaction rates of two different enzymes, L and M, vary when the pH changes. rate of reaction pH acidic alkaline neutral enzyme L enzyme M Use to state the pH at which each of these enzymes work the fastest. pH for enzyme L: pH for enzyme M: Table 8.1 lists the names of three enzymes found in the alimentary canal. Complete Table 8.1 by writing in the names of the substrate and one end-product for each enzyme. Choose your answers from the list. amino acids cellulose fat fatty acids glucose glycerol maltose protein starch vitamins Table 8.1 name of enzyme substrate one end-product amylase lipase protease
5. Enzymes  →  5.1. Enzymes
7. Human nutrition  →  7.4. Chemical digestion
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