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B2 REVISION – CHAPTER 1 – Cells, tissues and organs What do plant cells have that animal cells do not? Sketch and label a plant and an animal cell; Use pictures and words to describe the two ways substances can move in and out of cells Diffusion What is the function of: Nucleus – Mitochondria Ribosomes Chloroplasts Active Transport Define the following terms: Tissue Cell Wall Organ Draw and label 2 specialised cells. Explain their structure is adapted to suit their function Organ System KEY WORDS: Structure Function Specialised Diffusion Osmosis ASSESSMENT: B2 REVISION – CHAPTER 2 – Photosynthesis What is the equation for photosynthesis Why do plants need nitrates? Respiration Where in the plant does it occur? How are leaves adapted to perform photosynthesis? Explain how plants use glucose for the following: Why do plants need magnesium? Transport Explain how light, CO2 and temperature are limiting factors of photosynthesis Storage KEY WORDS: Respiration Photosynthesis Limiting Factor Nitrates Magnesium ASSESSMENT: B2 REVISION – CHAPTER 2 Continued – Organisms in their environment What physical factors can affect the distribution of living organisms? Define the following words: Mean Why do we need to collect data n the distribution of living organisms? Explain how you could use a quadrat and a transect to collect data on the distribution of organisms What can we use data about the distribution of living organisms for? Median Mode Range KEY WORDS: Quadrat Transect Sample Distribution ASSESSMENT: B2 REVISION – CHAPTER 3 – Enzymes What are enzymes made from? What do enzymes do? What is the equation for aerobic respiration? Where in the cell does it occur? Why do we need respiration? What are the 3 groups of enzymes in digestion? What is their substrate and what do they break them down into? 1) 2) How do they work? (explain & draw the lock & key mechanism 3) Why is the stomach acidic? What effect does temperature have on enzyme activity What effect does pH have on enzyme activity Describe 3 industrial uses for enzymes What is bile, what does it do and how does it do it? KEY WORDS: Enzyme Lock and Key Denature Aerobic respiration Bile Carbohydrase/Protease/Lipase ASSESSMENT: B2 REVISION – CHAPTER 4 – Energy from Respiration What is the formula for: HIGHER TIER ONLY Describe the effects that exercise has on the body. For each effect, explain why this happens Aerobic Respiration Explain the term ‘oxygen debt’ Anaerobic respiration Give three reasons with detail as to why organisms need to respire How do you repay this debt? 1. 2. 3. Where does respiration take place? Draw a diagram. Which type of respiration releases the most energy? KEY WORDS: Aerobic Anaerobic Respiration Lactic Acid Oxygen debt (H) ASSESSMENT: B2 REVISION – CHAPTER 5 – Inheritance What is mitosis and why is it needed? What are stem cells? State 2 uses of stem cells: How many chromosomes in a) gamete and b) somatic cell? What is an allele? What is differentiation? What does a) dominant; and b) recessive mean? How does it differ in plants and animals? State 2 problems with stem cell research: What is meiosis? Chromosomes are made of long strands of what? What is Polydactyly and what causes it? What is Cystic Fibrosis and what causes it? Small sections of this are called what? Why is it important? What do genes code for? On the back, cross 2 CF carriers and describe the offspring KEY WORDS: How does it help generate variation? What is DNA fingerprinting? Chromosome Mitosis / Meiosis Gene Allele DNA Stem Cells ASSESSMENT: B2 REVISION – CHAPTER 6 – Old and new species What is a fossil? What is the major problem with the fossil record? Why is this an issue? How are they formed? What is isolation and how does it occur? What is extinction? What can cause extinction? HIGHER ONLY What is speciation? How does this lead to new species? KEY WORDS: Fossil Extinction Isolation Evolution Speciation (H) ASSESSMENT: