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Beschreibung
Mindmap von megan.daye4, aktualisiert more than 1 year ago
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Erstellt von megan.daye4
vor etwa 11 Jahre
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Biodiversity
- Evolution
- The process by which new species are formed from
pre-existing ones over very long periods of time.
- Charles Darwin
- Studied Finches on the Galapagos Islands
- Observations
- Individuals produce large numbers of
offspring (overproduce) but the number of
adults in a population remains constant from
one generation to the next
- Individuals produce large numbers of
offspring (overproduce) but the number of
adults in a population remains constant from
one generation to the next
- Studied Finches on the Galapagos Islands
- Charles Darwin
- Adaptive radiation
- The emergence of new species from a common ancestor introduced into a
new environment
- The emergence of new species from a common ancestor introduced into a
new environment
- Charles Darwin suggested that evolution
occured as a consequence of natural selection
- Natural selection
- The mechanism by which changes in species are brought about
- Suggests that organisms best adapted to their
environment are most likely to survive and reproduce
- The successful genes are then
passed on to the offspring
- The successful genes are then
passed on to the offspring
- The mechanism by which changes in species are brought about
- The process by which new species are formed from
pre-existing ones over very long periods of time.
- Reasons for extinction
- Genetic bottleneck
- An evolutionary event in
which a significant
proportion of a species dies
and genetic diversity within
the species is reduced
- An evolutionary event in
which a significant
proportion of a species dies
and genetic diversity within
the species is reduced
- Competition between species
- Competition for resources such
as; food, land, territory and mates
- Competition for resources such
as; food, land, territory and mates
- Overhunting by humans
- Deforestation or destruction of habitats
- Genetic bottleneck
- Spatially
- Refers to geographical space. Some places
have more biodiversity than others as you
move from the poles toward the equator
- The most biodiverse places are
the rainforest and the coral reef
- The most biodiverse places are
the rainforest and the coral reef
- Refers to geographical space. Some places
have more biodiversity than others as you
move from the poles toward the equator
- Classification
- Kingdom.
Phylum.
Class.
Order.
Family.
Genus.
Species
- Binomial names
- Binomial names use
an organisms Genus
and then species
- E.g Homo sapien
- Its useful as scientists all over the
world can communicate easily
- E.g Homo sapien
- Binomial names use
an organisms Genus
and then species
- Kingdom.
Phylum.
Class.
Order.
Family.
Genus.
Species
- Biochemical Methods
- Genetic fingerprinting/DNA profiling:
using electrophoresis to see similarities
in the base sequence/genes
- DNA Hybridization: Comparing how separated DNA
strands of different species still bind together
- Genetic fingerprinting/DNA profiling:
using electrophoresis to see similarities
in the base sequence/genes
- Convergent Evolution
- Where two organisms from different species look
physicaly similar due to them evolving similar features
- E.g Hedgehog and porcupine
- E.g Hedgehog and porcupine
- Where two organisms from different species look
physicaly similar due to them evolving similar features
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