Cards (9)

  • "3 ways in which courtship behaviour increases the probability of successful mating"
    • allows organism to recognise same species
    • formation of a pair bond
    • indicates fertility
  • "Give 2 differences in the variation in body length of male and female thorny lizards"
    • females are generally longer (up to 115m)
    • females show a greater variation/ range
  • "explain why fewer species of plant would lead to fewer species of lizard in the oil palm plantation"
    • fewer habitats
    • fewer insect species
    • so fewer food sources
  • "suggest an explanation for the relationship between the concentration of herbicide and the mean crop yield"
    • as concentration of herbicide increases more weeds are killed so more crops/ higher yield
    • but high concentrations of the herbicide damage the crops
  • complete table:
    A) Kingdom
    B) Phylum
    C) class
    D) order
    E) family
    F) luscinia
    G) svecica
  • "what is meant by genetic diversity?"
    • number of different alleles of each gene
  • "what is the difference between species richness and index of diversity?"
    • Species richness is a measure of the number of different species in a community.
    • An index of diversity describes the relationship between the number of species in a community and the number of individuals in each species.
  • Explain why it may be more useful to calculate the index of diversity than to record the species richness
    • Measures number of individuals (of each species) and number of species
    • Some species only present in small numbers
  • a sampling procedure could be standardised by using the same sample size of an area