Responses & Heat
What is a change that causes an organism to respond called?
Stimulus
Thick fur is what type of adaptation?
Structural
Is temperature biotic or abiotic?
Abiotic
What piece of equipment is used to sample plants in a small area?
Quadrat
Is a lizard an endotherm or ectotherm?
Ectotherm
What is the name for a plant growing towards light?
Positive phototropism
A lizard hiding in the shade when hot is what type of adaptation?
Behavioural
What do we call all members of the same species living in one area?
Population
What sampling method would you use to investigate how plants change with distance from a pond?
Transect
Heat travelling from the Sun to an organism is what type of heat transfer?
Radiation
A lizard lies on a hot rock and gains heat through direct contact. Name the heat-transfer process.
Conduction
Producing concentrated urine to conserve water is what type of adaptation?
→ Physiological
What is the difference between population size and species diversity?
Population size = number of individuals of one species
species diversity = variety of species
Why should scientists use several random quadrats instead of just one?
- More reliable sample
Sweating cools a human through which process?
Evaporation
What happens to auxin when light shines from one side of a plant shoot?
Auxin becomes unevenly distributed/moves to the shaded side, causing unequal growth
Name one plant adaptation that allows regrowth after bushfire and explain how it helps. (not thick bark)
epicormic buds/lignotubers allow the plant to resprout.
A new predator enters an ecosystem and the prey population decreases. Is the predator a biotic or abiotic factor? Explain.
Biotic: it is a living organism interacting with the prey
Scientists capture, mark, release and later recapture animals. Name the technique.
Capture–recapture
A pond becomes more acidic and its fish population decreases. Identify the abiotic factor responsible.
pH
A plant shoot grows towards a window. Identify the stimulus, response and whether the tropism is positive or negative
Stimulus = light
response = phototropism/growth toward light
positive
Explain how thick bark can help an Australian plant survive a bushfire.
Insulates/protects living tissue from heat damage, increasing survival/regrowth
An ecosystem had 8 species but now contains only 5. What has decreased?
Species diversity
Why are quadrats placed at set intervals along a transect instead of randomly?
To consistently measure how abundance/distribution changes with distance along an environmental gradient
An ectotherm becomes too hot. Suggest one behavioural response and explain how it helps.
- moves into shade/burrow
- reduces heat gain and helps lower/control body temperature