Biodiversity EXAM QS

Describe how the structure of llama haemoglobin is likely to be different from that of camel haemoglobin with reference to the four levels of protein structure. [6 marks]
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Terms in this set (27)
difference in primary structure as one amino acid is changed,
amino acid change could cause change to secondary structure,
initial coiling or folding of polypeptide chain (alpha helix and beta pleated sheet),
amino acid change could cause change to tertiary structure,
further coiling of secondary structure and ionic bonding and disulphide bonds,
amino acid change has not changed quaternary structure as alpha and beta subunits still able to form haemoglobin in both camel and llama
Outline a valid investigation that could determine the effect of varying the moisture content of the soil on the growth of N. thermarum. [4]grow N thermarum in a range of soil water content, leave for 24 hours, measure height of individual plants, calculate mean from the resultsName the international agreement that exists to restrict the sale of rare species [1]Convention on International Trade in Endangered Species (CITES)Name the agreement that encourages fair sharing of benefits from the legal use of endangered species. [1]Rio Convention on BiodiversityExplain the importance of sampling in measuring the biodiversity of a habitat [2 marks]it's difficult to count every individual, a sample provides an estimate and a representative of the whole areaOutline the significance of a low value of Simpson's Index of Diversity. [2 marks]habitat dominated by few species, ecosystem is less likely to cope with changeExplain why it is sometimes necessary to conserve a plant species outside its natural habitat (ex situ) [3]natural habitat destroyed by human activity, population in natural habitat is very low making wild sexual reproduction difficult, ex situ can maintain the gene poolOutline the advantages of using a seed bank, as opposed to adult plants, in order to conserve an endangered plant species [4]most plant produce an excess of seeds, so can be collected from wild without damaging wild plant, seeds take up little space, able to store large numbers of seedsSuggest why it is important to ensure that, for each species, the seeds in a seed bank have been collected from several different sites in the wild. [3]maintain gene pool, reduced chance of future environmental change affecting whole population, reduces chances of inbreedingState two of the aims of the CITES agreement. [2]regulate trade in selected species, ensure trade doesn't put wild populations at riskWhat could be done to try to ensure the success of a release programme? [3]species healthy and quarantined before release, adequate natural food supply, protect reserve and prevent poachingDescribe three characteristics of continuous variation [3]no defined categories, range of values, quantitativeSuggest what is meant by critically endangered [1]species likely to become extinctExplain why the white-backed vultures in the captive breeding programme were collected from several different areas and housed in three separate centres [3]maintains gene pool, reduces risk of inbreeding, less likely all are contaminated with painkillerState 2 aims of the Rio Convention on Biological Diversity convention [2]sustainable use of organisms and habitats. international cooperation on biodiversity issuesScientists planned to sample an ecosystem with 3 different sized areas (conifer trees 800m, marshy area 2400m, grazed area 3200). Suggest sampling strategy should use and comment on number of samples they should collect (3)stratified and random sampling, number of samples taken in each area proportional to area's size, 8 samples in conifer tree area, 24 marshy area, 32 in grazed areaSuggest 2 reasons why this species is critically endangered in the wild (2)species is poached, species habitat is being destroyed by human activity like climate change and deforestationWhich option best describes the conservation at the Millennium Seed Bank (holds 2 billion seeds) A in-situ conservation of species biodiversity B in-situ conservation of habitat biodiversity C ex-situ conservation of species biodiversity D ex-situ conservation of habitat biodiversityC