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IB ESS Topic 3.1-3.3 Review questions n answers(updated)
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IB ESS Topic 3.1-3.3 Review questions n answers(updated)
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IB ESS Topic 3.1-3.3 Reviewbiodiversity - correct answer ✔✔The variety of species, genes, and habitats of an ecosystem
variation - correct answer ✔✔the differences, either physical or genetic, between individuals of a
species
species diversity - correct answer ✔✔the number of species (richness) and their relative proportions
(evenness) in a community
genetic diversity - correct answer ✔✔the range of genetic material present in a gene pool or population
of a species
biodiversity hotspots - correct answer ✔✔an area of high biodiversity which is under threat from human
activities
endemic species - correct answer ✔✔the species which only occur in one specific area; example lemur
in Madagascar
speciation - correct answer ✔✔the gradual change in populations of a species over time - often caused
by geographical isolations, resulting in new species
evolution - correct answer ✔✔Charles Darwin's Theory that suggest species change over time by the
species adapting to environmental pressures through natural selection; takes place over a long period of
time
natural selection - correct answer ✔✔survival of the fittest - only the best suited organisms will be able
to compete and so survive long enough to reproduce - their favorable traits are then passed on to new
generations
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