Biology 1 Key terms and information you need to know for your biology 1 GCSE 3.5 / 5 based on 2 ratings ? BiologyGCSEWJEC Created by: OwainCreated on: 02-01-13 20:59 What is Variation? Differences between members of the same spiecies 1 of 30 What are the 2 types of variation ? Continuous and Discontinuous 2 of 30 What is evolution? It is a change in organisms over time 3 of 30 Why does evolution happen and who was the first person to descripe this? Evolution happens as a result of natural selection which was first described by Charles Darwin 4 of 30 What are sense organs? They are a group of special cells calles Receptor Cells 5 of 30 Receptor cells respond to ...? Stimuli (changes in the enviroment) 6 of 30 They send this information to ....? The central nervouse system. 7 of 30 What are the electrical signals called and what do they travell along? Impules that travell along neurons 8 of 30 Why do plants grow towards the light? Posotive phototropism 9 of 30 Why do plants grow towards Gravity? Posotive Gravitropism 10 of 30 What is Homeostasis? They are the ways that the body keeps its conditions constant 11 of 30 Name 4 condition that the body has to keep constant? Temperature, PH, Concentration of nutrients and Concentration of water 12 of 30 What is type 1 diabetes? It is a condition where the blood levels get fatally high because the pancrease is no producing enough insulin 13 of 30 What is negative feedback? It is a process which makes sure that all changes in the body are reversed to there normall status 14 of 30 What effect has alcahol on the body? It changes chemical processes in the body. 15 of 30 How can you put all living things into 3 different groups? Plants, animals and micro-organisms 16 of 30 How can we seperate all living things by features we can see? Plants, animals, fungi, bacteria and unicellular organisms 17 of 30 How can we seperate all living things for DNA analysis? Ancient bacteria, bacteria and all organisms with a nucleus. 18 of 30 Why do animals have scientific names? Because they are the same all around the world. 19 of 30 What is an adaption? It is a change which makes living thing more suited to their enviroment 20 of 30 How can population be effected? Competition, Disease, Predators and pollution 21 of 30 What is intensive farming? It is where as many plants/animals as possible are put in the smallest space available 22 of 30 How can meat productuion be increased? Controlling space, predators, disease and temperature. 23 of 30 How can crop production be increased? Using pesticides and fertilisers 24 of 30 Where is the element Nitrogen found Ammonia, Urea, Proteins and Nitrates 25 of 30 What is a genotype? It is the combination of alleles that an organism has. 26 of 30 What is a phenotype? It is the appearance of an organism caused by its genes. 27 of 30 What is the difference between homozygous and heterozygous? Homozygoes is where 2 of the same alleles cross, but Heterozygous is where 2 different alleles cross. 28 of 30 Who was Gregor Mendel? Gregor Mendel was the first person to suggest that characteristics are inherited. 29 of 30 What is genetic modification? Genetic modification is where a gene is removed from one organism and put into another. 30 of 30
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