IGCSE Biology Revision Answers.pdf - Hodder Plus Home

IGCSE Biology Revision Answers

Test 2 Classification of Living Organisms

5. The animal is a thin annelid cylinder in shape with rings around its body showing that it is segmented. The animal is a thin reptile cylinder in shape with a dry scaly skin. The animal is a thin nematode cylinder in shape and has a moist, slimy skin. 6. Dicotyledons 7. Mammals; myriapods; molluscs 8. The skin is moist and amphibian they have legs. The skin is covered in mammals fur and they have legs. The skin is covered in fish scales and they have fins. The skin is covered in birds feathers and they have legs. The skin is covered in reptiles scales and they have legs. 9. Mammals 10. (a) and (d) ______________________________

1. 2. 3. 4.

Test 3 Classification of Living Organisms

Test 1 Characteristics of Living Organisms 1. (b), (c) and (e) 2. Nutrition; respiration 3. (b) and (d) 4. T, F, F, F 5. Nutrition; respiration 6. Metabolism; excretion 7. F, T, F, F 8. Movement 9. The supply of petrol nutrition for the car is similar to The release of energy respiration when petrol is burnt in a car is like The release of energy movement from petrol in a car makes the wheels go round. In a living organism this is like A car releases exhaust excretion fumes. In a living organism this is like 10. (b) and (d) _____________________________

Y and Z; genus F, F, T, F (b) and (d) Arachnids

1. 2. 3. 4. 5. 6. 7. 8. © Hodder Education 2009

(c) and (e) Vertebrates 2 T, T, F, F (a), (c) and (d) Arthropods Arthropods (a) and (c)

9. Rana ibericus 10. Birds Legs covered in scales and body covered in feathers. Amphibians Body covered in moist skin. Reptiles Body covered in dry scales. Mammals Body covered in hair or fur. ______________________________

Test 4 Cell Structure and Function 1. T, F, T, T, F, F 2. A cell membrane 3. F, F, F, T 4. (c) 5. A large surface area 6. root hair cell leaf organ xylem tissue 7. Trachea or oviducts 8. (a) 9. T, T, F, F 10. nucleus controls cell activities cell wall gives the plant cell shape chloroplast produces food cell controls what enters membrane and leaves the cell

______________________ Test 5 Cell Structure and Function 1. 2. 3. 4. 5. 6. 7.

Cell wall Chloroplast (a) F, F, T, T (b) and (d) T, F, F, T, F, T Contraction

© Hodder Education 2009

8. Cell wall 9. Fungi _____________________________

Test 6 Movement in and out of Cells 1. (c) 2. T, T, F, F 3. Diffusion 4. (a) 5. (a) 6. T, F, F, F 7. Down 8. Solute when salt dissolves in water, this is the salt Solution when salt dissolves in water, this is the product Solvent when salt dissolves in water, this is the water 9. T, T, F, F, T 10. Does not need energy _____________________________

Test 7 Cells 1. (c) 2. T, F, F, T 3. Energy; against 4. T, F, T, F 5. (a) and (c) 6. Down; lost; to; 6% 7. (a) 8. T, F, T, F, F 9. Water; high; low; down 10. F, T, T, T, F

_______________________

Test 8 Enzymes 1. (b) 2. 2 3. (c) 4. (a) and (b) 5. F, T, F, F, T 6. F, F, T, T 7. (c) 8. F, F, T, T _____________________________

Test 9 Nutrients and Plant Nutrition 1. Amino acids 2. Protein 3. (c) 4. Nitrogen 5. Less carbon dioxide; more oxygen 6. (c) 7. F, F, F, T 8. (b) 9. Mineral ions; chlorophyll 10. F, F, F, T _____________________________

Test 11 Nutrients and Plant Nutrition 1. Bacteria; lactic acid 2. (a) 3. (d) 4. A wood burner 5. F, T, F, T, F, F 6. Photosynthesis manufactures small carbohydrate molecules. Some of the molecules made in photosynthesis are converted to amino acids. Some molecules made in photosynthesis are converted to starch grains.

These are called glucose. These are used for protein synthesis. These are used for storage.

7. Magnesium 8. F, T, F 9. (d) 10. F, F, T, F

_______________________ Test 12 Animal Nutrition

Test 10 Nutrients and Plant Nutrition 1. Water; oxygen 2. (c) 3. T, F, F, T 4. (d) 5. Stoma 6. (b) 7. Glucose; chlorophyll; chloroplast 8. Amino acids/proteins 9. (d) 10. Fat C Carbohydrate B Protein A _____________________________

1. (b), (d) and (e) 2. Duodenum 3. Peristalsis 4. Fats Fatty acids and glycerol Proteins Amino acids Carbohydrates Simple sugars 5. Liver 6. Incisor biting and cutting Canine piercing and tearing Molars grinding and chewing 7. F, F, F, T 8. (b) and (d) 9. Pancreas 10. (a) and (b)

_______________________


Test 13 Animal Nutrition 1. Produces digestive pancreas juice Transports food oesophagus from mouth to stomach Absorbs digested small food intestine Produces stomach hydrochloric acid 2. Mouth; stomach 3. (a) and (b) 4. F, T, T, F, T 5. (c) 6. Stomach 7. Amylase 8. (a) 9. (b), (c) and (e) 10. Constipation _____________________________

Test 14 Transport in Plants 1. Xylem vessels; mesophyll cells 2. (d) 3. F, F, F, T 4. Phloem; translocation 5. (b) 6. T, F, T, F 7. Root 8. F, T, F, T _____________________________

Test 15 Transport in Humans 1. 2. 3. 4. 5. 6.

Right ventricle T, F, F (a) X and Z (b) (a)

7. Plasma Platelets

carrying food substances clotting


Red blood cells carrying oxygen White blood defence against cells disease 8. (b) 9. Is fitter 10. Towards the heart _____________________________

Test 16 Transport in Humans 1. (a), (b) and (d) 2. Pulmonary artery; aorta 3. F, T, F, T, F 4. (b) and (d) 5. F, T, F, F 6. A vein B artery C capillaries 7. (b) 8. Left ventricle 9. Carrying oxygen 10. Arteries; capillaries; veins ______________________________

Test 17 Respiration 1. (b), (d) and (e) 2. Tar 3. Lactic acid 4. Carbon stops blood cells monoxide carrying oxygen Nicotine raises blood pressure Tar causes lung cancer 5. T, T, F 6. To make the dough rise 7. (d) 8. Water 9. (a) and (b) 10. C ______________________________

Test 18 Respiration 1. (b) and (c) 2. Lactic acid 3. Ferment; alcohol 4. (c) 5. F, F, F, T 6. Increases; increases 7. A smaller surface area 8. (c) 9. F, T, F, F 10. (a) ______________________________

Test 19 Transport and Respiration 1. (a) 2. 1 Exposure to damaged tissue 2 Platelets activated 3 Fibrinogen converted to fibrin 4 Red blood cells trapped 3. An infection 4. F, T, T, F 5. (b) 6. Lymphocytes; antibodies 7. (c) 8. Lymph vessels 9. Contract; relax; up and out; increases 10. F, T, F _____________________________

Test 20 Excretion 1. F, T, F, F 2. Excess protein 3. Urine 4. (a), (c) and (d) 5. Urine 6. (b) 7. B 8. (a), (b) and (d) _____________________________


Test 21 Gas Exchange and Excretion 1. 1

External intercostal muscles contract 2 Ribs are raised 3 Volume of the chest increases 4 Pressure inside the chest falls 5 Air enters 2. F, T, F, F 3. Proteins 4. (b) 5. T, F, F, F 6. (b) 7. F, T, F 8. (b) ______________________________

Test 22 Co-ordination and Response 1. (c) 2. F, T, F, F 3. Synapse 4. Plants; gravity; growth 5. (a) 6. 1 Sense organ 2 Sensory neurone 3 Central nervous system 4 Motor neurone 5 Effector 7. Retina 8. Sensory neurone; motor neurone 9. A receptor; a relay; an effector 10. (a) ______________________________

Test 23 Co-ordination and Response 1. Adrenaline 2. (c)

3. 1 receptor 2 sensory neurone 3 relay neurone 4 motor neurone 5 effector 4. Thicker; less 5. F, T, T 6. Circular; radial 7. Motor neurone 8. (d) 9. Triceps 10. (b) and (d) ______________________________

Test 24 Co-ordination and Response 1. Homeostasis 2. Evaporation; cooled 3. F, F, F, T 4. (b) and (c) 5. (c) 6. T, T, T, T 7. (c) 8. F, F, T, F ______________________________

Test 25 Co-ordination and Response 1. T, F, F, F 2. (a) and (b) 3. Retina; black-and-white; dim 4. (c) 5. (a) 6. Glycogen; insulin; sugar 7. T, F, T, F, F 8. Glucagon 9. (c) and (d) 10. F, F, F, T ______________________________

Test 26 Reproduction 1. (a), (c) and (d) 2. T, F, F, F 3. Anther © Hodder Education 2009

4. (c) and (d) 5. Contracts; dilates; dilates 6. B and C; A and D; C 7. F, F, T, F 8. Pollination; pollen grain; fertilisation 9. (c) 10. F, F, T, T ______________________________

Test 27 Reproduction 1. (b) 2. T, T, F, F 3. Testes 4. (a) 5. Anther; filament 6. F, T, F 7. C; E; B 8. (c) 9. Southwest 10. Ovary forms a fruit Petal drops off Ovule becomes a seed Sepal remains in position, protects the developing fruit Stamen dries up and falls off

Test 28 Reproduction – Revision mode 1. F, F, T, F 2. (a) 3. Amnion 4. Sperms; vagina 5. T, T, T, F 6. (a) 7. Oviduct; vagina; ovary 8. (b) 9. Menopause 10. (c) ______________________________

Test 29 Reproduction 1. F, F, T, F 2. Decreases; very low levels 3. Testes 4. (b) and (d) 5. F, F, T, F 6. A vasectomy 7. (a) 8. Puberty 9. T, F, T, T 10. (d) ______________________________

2 3

Food reserves are digested Digested food moves to growing points 4 The radicle grows out of the seed 5 The plumule grows out of the seed 6. Main root; shoot; food reserve 7. (c) and (d) 8. 100oC; in an oven or incubator; water ______________________________

Test 33 Inheritance Test 30 Reproduction 1. F, F, T, T 2. (a) and (d) 3. T, T, F, F 4. Bacterial; can be treated 5. (a), (c) and (d) 6. F, F, T, T 7. Cutting; oviducts 8. T, F, F, F ______________________________

1. Sex; X; X; X; Y 2. (c) 3. F, F, T, F 4. (c) 5. Mitosis; diploid 6. (b), (c) and (e) 7. F, T, F, F, F 8. Diploid; haploid; more 9. (d) 10. 22+Y; 23+Y ______________________________

Test 31 Reproduction

Test 34 Inheritance

1. (a) and (d) 2. Ovaries 3. F, T, F, F 4. Mammary 5. (a), (b), (c), (e) and (f) 6. Artificial insemination 7. F, F, F, F, T 8. (a) ______________________________

1. (a) and (c) 2. Haploid; diploid; neither; diploid 3. F, F, F, T 4. (c) 5. M; 0.5M; M 6. (d) 7. An X chromosome ______________________________

Test 32 Growth and Development

Test 35 Inheritance

1. F, F, F, T 2. (b) 3. Germination; decreases 4. Water 5. 1 Enzymes in the seed become active © Hodder Education 2009

1. 2. 3. 4. 5. 6. 7.

BB and Bb F, T, F, F (b), (c) and (d) Harmful; increased Aidan (d) 1:2:1; 3:1

8. 3:1 9. (a) and (c) 10. (b)

_______________________ Test 36 Inheritance 1. 47 2. T, F, F, T, T, T 3. (a) 4. 25% 5. T, F, F, F, T 6. 50% 7. (b) and (e) 8. T, F, F, T 9. (e) 10. 200 red and 200 white ______________________________

Test 37 Inheritance 1. (b) 2. F, F, F, T 3. An antibiotic; resistant; survive 4. Co-dominance 5. (c) 6. (c) 7. A white forelock; dominant ______________________________

Test 38 Relationships 1. (a) 2. T, T, F, T 3. C 4. (d) 5. Producers 6. (d) 7. F, T, F, F 8. Energy flow 9. Exponential phase 10. C ______________________________


Test 39 Relationships 1. (a) and (c) 2. F, F, F, T 3. Photosynthesis 4. Reproduction; death 5. (b) and (d) 6. Carnivore 7. Light; chemical 8. (b) and (c) 9. T, T, F, T 10. Decomposers ______________________________

Test 40 Relationships 1. F, F, F, T 2. (a) 3. Cause mutations 4. Carbon monoxide 5. F, T, F, F 6. (a) and (c) 7. Nitrates; dissolved oxygen 8. T, F, F, F, T 9. (a) 10. Decreases; light; suspended solids ______________________________

Test 41 Relationships 1. 2. 3. 4. 5. 6. 7. 8. 9.

F, F, T, F (c) Increase; oxygen (a) F, T, F, F (c) D (b) F, F, T, F

10. 1 Screening to remove plastics and rubber for recycling 2 Sedimentation to allow solids to collect 3 Sludge digestion to kill parasite eggs and break down organic matter 4 Liquid filtration to remove particles in suspension

Test 42 Relationships 1. (a), (d) and (f) 2. T, F, T, T, F, F 3. Plastic 4. T, T, F, F 5. (a), (d) and (e) 6. Not biodegradable 7. (c) 8. T, F, T, T, F ___________________________
