0610_w13_qp_21
A paper of Biology, 0610
Questions:
10
Year:
2013
Paper:
2
Variant:
1
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1
For Examiner's Use shows a woodlouse. The woodlouse is a crustacean, one of the four groups of arthropod. It is a herbivore that lives on land and eats decaying plant materials. It breathes with gills that must be kept moist. Name two other groups of arthropod. For each group state one feature found only in animals of that group. 1 group feature 2 group feature Some students were sent to find woodlice for an investigation. Suggest and explain two reasons why populations of woodlice are usually found under stones, decaying wood and leaves. 1 reason explanation 2 reason explanation
19. Organisms and their environment  →  19.4. Populations
1. Characteristics and classification of living organisms  →  1.1. Characteristics of living organisms
6. Plant nutrition  →  6.2. Leaf structure
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3
For Examiner's Use shows a poster that a student made for a biology lesson. BLOOD A plasma that makes antibodies B red blood cell that transports oxygen C white blood cells that transport glucose The teacher told the class that the student had made a number of mistakes. For each of the three labels, correct the mistakes by giving the name and function of each component. A name function B name function C name function For Examiner's Use Name one other component of the blood that is not labelled on the poster. State its function. component function
9. Transport in animals  →  9.4. Blood
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4
For Examiner's Use Table 4.1 shows some of the top ten causes of death in parts of the world during 2010. Table 4.1 cause of death percentage of the deaths of adult males percentage of the deaths of adult females cancer (lung, alimentary canal, breast, prostate and others) coronary heart disease stroke (blood clot in brain) shows the data for the adult males. cancers coronary heart disease stroke percentage of deaths males females males females males females Draw the bars for the adult females on . Calculate the percentage of males dying from causes other than those in Table 4.1. Show your working. % State the type of cancer, listed in Table 4.1, that occurs only in males. For Examiner's Use The lifestyles of people can affect their risk of dying from some diseases. Suggest three actions that humans could take to lower their risk of dying from coronary heart disease. In 2010 2% of adult male deaths were due to liver disease. Suggest one aspect of their life style that could have caused this.
9. Transport in animals  →  9.2. Heart
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5
For Examiner's Use Wheat is a type of grass that has been grown by humans for about 9000 years. The earliest variety is called emmer. shows emmer wheat and a modern type of wheat. ear of modern wheat ear of emmer wheat ear ear awn grain Use to describe two ways in which emmer wheat is different from modern wheat. Over hundreds of years farmers improved the yield of wheat crops. They kept grains from the highest yielding ears to grow the next crop. Name this farming practice. For Examiner's Use There is evidence that emmer wheat was pollinated by pollen from other grasses. This produced new varieties. shows a section through a flower of wheat. Suggest the method of pollination in this wheat flower. Give two reasons for your answer. method reasons For Examiner's Use 3000 years ago some farmers stored wheat in pits in the ground. shows a pit full of grain. chalk rock chalk rock waterproof, airtight cap of clay layer of wheat grains that germinate wheat grains that do not germinate or decay ground level Wheat grains near the edge of the pit germinate. The germinating grains use up all of one gas from the air in the pit and produce a different gas. The germinating grains also release heat that causes the temperature in the pit to rise to 80 °C. Name the chemical reaction that uses up and produces the gases. Name the gas used up during this chemical reaction. Name the gas released during this chemical reaction. For Examiner's Use Suggest and explain three reasons why most of the grains in the pit did not germinate or decay.
16. Reproduction  →  16.3. Sexual reproduction in plants
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6
For Examiner's Use Complete the sentences about the contents of a nucleus by writing the most appropriate word in each space. Use only words from the box. alleles chromosomes diploid DNA gametes genes haploid muscles Chromosomes are long threads of made up of many . Two or more alternative forms of a gene, are called . A nucleus contains a single set of unpaired . These nuclei are found in .
17. Inheritance  →  17.1. Chromosomes, genes and proteins
16. Reproduction  →  16.2. Sexual reproduction
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7
For Examiner's Use shows a carbon cycle. carbon dioxide in the air carbon compounds in fossil fuels carbohydrate, fat and protein in green plants carbohydrate, fat and protein in soil carbohydrate, fat and protein in animals death death death feeding feeding feeding death death death A B C D E F Write the letter of an arrow, A, B, C, D, E, or F as shown in , that represents each of the following processes. combustion photosynthesis respiration Many of the world’s governments are concerned that the carbon dioxide concentration in the atmosphere keeps rising. Explain why they are concerned about the rise in carbon dioxide concentration. For Examiner's Use Gazelles are herbivores that eat grass. Oxpecker birds feed on ticks that live on the skin of gazelles. Ticks suck blood from the gazelles. Draw a food chain to represent these feeding relationships. State what the arrows represent in a food chain. Explain why a food chain is not considered to be a cycle like the carbon cycle.
19. Organisms and their environment  →  19.2. Food chains and food webs
19. Organisms and their environment  →  19.3. Nutrient cycles
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8
For Examiner's Use Throughout the world there are almost equal numbers of female and male babies born. The sex of a baby is determined by the sex chromosomes. State the sex chromosomes present in a female and a male. Use X and Y to represent the sex chromosomes. female male Complete the genetic diagram to show the inheritance of sex in humans. parent parental chromosomes gametes offspring chromosomes offspring male female
17. Inheritance  →  17.1. Chromosomes, genes and proteins
16. Reproduction  →  16.4. Sexual reproduction in humans
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9
For Examiner's Use The enzyme lactase digests lactose into simple sugars. Define the term enzyme. Describe how you could test for the presence of reducing sugars. State what you would observe if the result was positive. For Examiner's Use shows the results of an investigation into the effect of pH on the activity of the enzyme lactase. pH activity of lactase Use to determine the optimum pH of lactase. Describe the effect of the changes in pH on the activity of lactase. For Examiner's Use Enzymes are involved in chemical digestion. Explain the role of teeth in physical digestion.
5. Enzymes  →  5.1. Enzymes
21. Biotechnology and genetic modification  →  21.2. Biotechnology
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