AQA 2022// GCSE COMBINED SCIENCE: TRILOGY Foundation Tier Biology Paper 2F

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Materials For this paper you must have: • a ruler • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in ... the boxes at the top of this page. • Answer all questions in the spaces provided. • If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s). • Do all rough work in this book. Cross through any work you do not want to be marked. • In all calculations, show clearly how you work out your answer. Information • The maximum mark for this paper is 70. • The marks for questions are shown in brackets. • You are expected to use a calculator where appropriate. • You are reminded of the need for good English and clear presentation in your answers. Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBINED SCIENCE: TRILOGY Foundation Tier Biology Paper 2F F 2 *02* IB/M/Jun22/8464/B/2F 0 1 This question is about genetics. 0 1 . 1 Crop plants are genetically modified (GM) for useful characteristics. Which useful characteristic are crops genetically modified for? [1 mark] Tick () one box. Fewer roots Larger yields Smaller fruits 0 1 . 2 What is one concern about GM crops? [1 mark] Tick () one box. GM crops will add to global warming. GM crops will cause air pollution. GM crops will harm wildlife. GM crops will produce too much food. Some inherited disorders are caused by a faulty piece of DNA. 0 1 . 3 What is the name of a piece of DNA that codes for a characteristic? [1 mark] Do not write outside the box 3 *03* Turn over ► IB/M/Jun22/8464/B/2F Do not write outside the box 0 1 . 4 DNA contains a code for making substances in the cell. What type of substance is made using the DNA code? [1 mark] Tick () one box. Fat Protein Starch Sugar Cystic fibrosis (CF) is an inherited disorder. The allele for having CF is recessive (h). The allele for not having CF is dominant (H). 0 1 . 5 What is a recessive allele? [1 mark] Tick () one box. An allele that is always expressed. An allele that is expressed if only one copy is present. An allele that is only expressed if two copies are present. Question 1 continues on the next page 4 *04* IB/M/Jun22/8464/B/2F Do not write outside the A man and a woman do not have CF. box The man has the alleles Hh. 0 1 . 6 What word describes the alleles of the man? [1 mark] Tick () one box. Heterozygous Homozygous Phenotype 0 1 . 7 The man and the woman want to have a child. Complete Figure 1 to show the possible genotypes of the child. Draw a ring around the genotype of a child who will have CF. [3 marks] Figure 1 Woman H h Man H h hh 5 *05* Turn over ► IB/M/Jun22/8464/B/2F Do not write outside the box 11 0 1 . 8 What is the chance that a child of the man and the woman will have CF? [1 mark] Tick () one box. 25% 50% 75% 100% 0 1 . 9 The woman is pregnant. The woman can have embryo screening to find out if the child will have CF. Suggest one reason why the woman might not want to have embryo screening. [1 mark] Turn over for the next question 6 *06* IB/M/Jun22/8464/B/2F Do not write outside the box 0 2 On a school field: • one area of the soil was usually wet • another area of the soil was usually dry. Students investigated the effect of water in the soil on the number of buttercup plants growing in each area. On the field the students marked out: • an area of 10 m by 10 m on the wet soil • an area of 10 m by 10 m on the dry soil. 0 2 . 1 Describe how a quadrat can be used to measure the size of the buttercup population on the wet soil area. [4 marks] 7 *07* Turn over ► IB/M/Jun22/8464/B/2F Do not write outside the box 0 2 . 2 What type of factor is water in the soil? [1 mark] Tick () one box. A biotic factor A control factor An abiotic factor 0 2 . 3 Give two factors which might affect the number of buttercups growing on the school field. Do not refer to water in your answer. [2 marks] 1 2 0 2 . 4 Complete the sentence. Choose the answer from the box. [1 mark] a control the dependent the independent In this investigation the number of buttercups in each quadrat was variable. Question 2 continues on the next page 8 *08* IB/M/Jun22/8464/B/2F Do not write outside the Figure 2 shows a quadrat on an area of the school field box . Figure 2 0 2 . 5 Calculate the area of the quadrat. [1 mark] Area of the quadrat = m2 0 2 . 6 The mean number of buttercups in one quadrat was 8 Calculate the number of buttercups per m2 Use your answer from Question 02.5 [2 marks] Number of buttercups = per m2 9 *09* Turn over ► IB/M/Jun22/8464/B/2F Do not write outside the Question 2 continues on the next page box DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED 10 *10* IB/M/Jun22/8464/B/2F Do not write outside the box In a laboratory another group of students investigated the effect of soil acidity on the growth of beans. This is the method used. 1. Put soil with a neutral pH in two large boxes. 2. Add acid to the soil in one box. 3. Plant some bean seeds in each box. 4. Water the seeds over 3 weeks. 5. After 3 weeks, measure the height of the bean plants in each box. 6. Calculate the mean height of bean plants in each box. 0 2 . 7 Give two improvements the students could make to the method to give more valid results. [2 marks] 1 2 11 *11* Turn over ► IB/M/Jun22/8464/B/2F Do not write outside the box 16 The students then carried out a valid investigation. Table 1 shows the students’ results. Table 1 Height of bean plants in cm Bean plant Acid soil Neutral soil 1 8 11 2 6 12 3 4 11 4 10 17 5 7 19 Mean 7 X 0 2 . 8 Calculate mean value X in Table 1. [2 marks] X = cm 0 2 . 9 What conclusion can the students make about the effect of acid soil on the growth of bean plants? [1 mark] 12 *12* IB/M/Jun22/8464/B/2F Do not write outside the 0 3 The theory of evolution by natural selection was suggested by box Charles Darwin in 1859. Evidence from fossils supports Darwin’s theory. 0 3 . 1 What evidence supports the theory of evolution by natural selection? [1 mark] Tick () one box. Knowledge of how DNA controls inheritance Knowledge of how the dinosaurs became extinct Knowledge of how the Earth was formed Knowledge of what causes global warming 13 *13* Turn over ► IB/M/Jun22/8464/B/2F Do not write outside the 0 3 box . 2 Figure 3 shows a fossil fly preserved in amber. The fossil formed when the amber solidified with the fly trapped inside. Figure 3 Why has the fly been preserved? [1 mark] Tick () one box. The amber has been kept at a constant temperature. The fly was soft-bodied. There was no oxygen in the amber. 14 *14* IB/M/Jun22/8464/B/2F Do not write outside the Figure 4 shows a simplified evolutionary tree for the insect group of animals. box Figure 4 Present day insects 0 3 . 3 Which present day insect evolved first? [1 mark] 0 3 . 4 Animals A, B, C and D were ancestors of present day insects. Which animal is the most recent ancestor of both grasshoppers and beetles? [1 mark] Tick () one box. A B C D 0 3 . 5 Name the group of present day insects which have wings which do not fold. [1 mark] 15 *15* Turn over ► IB/M/Jun22/8464/B/2F Do not write outside the box 0 3 . 6 The house fly has the binomial name Musca d [Show More]

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