Movement Flashcards
why is movement important
find food
mate
habitat
escape predation
passive movement adv
no energy
passive movement disadvantages
no control where you end up
active movement disadvantages
energy required
active movement adv
control where you land
moving in water adv
support
hydration
nutrient rich
environment buffered
moving in water challenges
strong currents
buoyancy
water levels fluctuate
specialised features for moving in water
cilia and flagella
feet like projections
fins and flippers
moving on land challenges
no support
energy hungry
complex and dramatic ecosystem
lack of water
UV radiation
oxygen in air
moving in air challenges
gravity
strong wind currents
energy hungry
specialised structures for moving on land
cell wall
vascular tissue
lignin and bark
seeds and spores
legs
adaptations for moving in air
light
production of seeds
large SA
increased muscles
adaptations for active movement
cilia
pseudopods
flagella
active propulsion
molluscs engulph water and then contract to push water through their body to achieve propulsion
features of insects that allow them to fly
hard exoskeleton
moult
inhabit water, air and land
six legs
wings
bird adaptations for flight
less dense bones
enlarged chest muscles
feathers
air sacs in lungs for more O2 per breath
biped features
big toe reduced
bowl like pelvis
femur angled inwards
foramen magnum on underside of skull
less robust upper arm
what makes organisms more likely to fossilise
have bones and hard structures
covered rapidly after death
remains are in an anoxic environment
organism does dissolve
relative dating methods
stratigraphy
index fossils
absolute dating methods
radiometric dating
what do fossils tell us
dates
physiology
diet
reproductive mode
movement
migration
development
thermoregulation
colour
behaviour
2 major evolutionary transitions
multicellularity
dawn of animals
adaptive radiation
= when evolutionary lineages undergo rapid diversification
what causes adaptive radiation
new environmental niche
no competition
