Topic 4 - biodiversity and plants 0.0 / 5 ? BiologyEcology, ecosystems and environmental biologyA2/A-levelEdexcel Created by: champion1607Created on: 23-05-18 18:55 Define species richness It is expressed as the number of species of a particular group 1 of 19 Define species evenness The overall spread of animals in different populations, i.e whether one community has lots compared to another 2 of 19 Describe the diversity index Used to measure diversity on a species level, the higher the value the greater the biodiversity 3 of 19 Describe the heterozygosity index Measures the proportion of genes which are present in heterozygous form 4 of 19 How do you calculate heterozygosity? Number of heterozygotes/number of individuals in the population 5 of 19 Define niche The way the species exploits its environment 6 of 19 Name the three types of adaptations Behavioural, anatomical and physiological (internal biochemical functioning) 7 of 19 Define evolution Change in the frequency of alleles in a population over time due to a change in selection pressure 8 of 19 What does the Hardy-Weinberg equation show us? Can be used to detect change in allele frequency in a population 9 of 19 What things need to be present for Hardy-Weinberg to apply? Mating must be random, large population, no migration, no mutations and no selection pressure 10 of 19 What two equations make up the Hardy-Weinberg equation? p + q = 1 & p2 + 2pq + q2 =1 (q = bb and p = Bb) 11 of 19 State the hierarchy of classification Domain, kingdom, phylum, class, order, family, genus and species 12 of 19 Name the three domains Archaea, bacteria and eukarya 13 of 19 How was archaea discovered? Carl Woese used molecular phylogeny to prove there was a third domain 14 of 19 What is molecular phylogeny? Analysis of genetic material ti establish evolutionary relationships between organisms 15 of 19 Define species Organisms with similar morphology which can interbreed to produce fertile offspring 16 of 19 Name the five kingdoms Animalia, plantae, fungi, protoctista and prokaryotae 17 of 19 Name three examples of the scientific process Peer review, publishing scientific journals an scientific conferences 18 of 19 What membrane surrounds a vacuole? Tonoplast membrane which allows movement in and out 19 of 19
Energy transfers and ecosystems AQA A2 Biology PART 3 of 4 TOPICS: Energy and ecosystems 5.0 / 5 based on 1 rating Teacher recommended
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