Identify the biotic factor.
Oxygen levels
New pathogens
Wind intensity
Light intensity
What thing are mammals not competing for?
Territory
Oxygen
Food
Mates
What structural adaptations do cacti have?
Chloroplasts for photosynthesis
It grows towards the light
Spines to stop them from being eaten
Identify the abiotic factors.
Light intensity, temperature, moisture, soil pH
New predators, availability of food, new pathogens
Kingdom, Phylum, Class, Order...
Family, Genus, Specaes
Family, Genus, Species
Familiae, Genius, Species
Familum, Gene, Species
What is a population?
Two or more communities of organisms
All the organisms of the same species in an area
The interactions between organisms and their environment
What does interdependence mean?
All organisms in an ecosystem depend upon each other.
Organisms in an ecosystem are independent of each other.
Photosynthesising plants in an ecosystem compete for light.
The populations of all species remain relatively constant.
Why do plants and animals adapt to their environment?
To prevent DNA mutation
To produce body heat
To survive and reproduce
To aerobically respire
What behavioural adaptation does a male peacock have?
He shows his tail feathers as a mating ritual
He has good vision and hearing
He has sharp claws and a sharp beak
What is a secondary consumer?
An organism that eats tertiary consumers.
An omnivore that eats plants and meat.
An organism that is a carnivore and eats primary consumers.
An organism that eats producers.
What is an ecosystem?
Two or more populations of organisms
All the organisms of the same species in an area
Two or more populations that exist in an environment
When the number of prey increase in an ecosystem, what happens to the number of predators shortly after?
Decreases
Increases
What changes have happened to the bones in the feet of horses over the last 50 million years?
There are more bones and they are smaller
There are more bones and they are larger
There are less bones and they are much larger
There are less bones and they are smaller
What is intraspecific competition?
The competition that exists between different species.
The competition that exists among organisms of same species.
What is an extremophile?
An organism that avoids extreme environments.
An organism that lives in an extreme environment.
What is a community?
The interaction between living organisms and the environment
Two or more populations of organisms
Two or more populations of organisms in their environment
All the organisms of the same or closely-related species
What is a stable community?
The size of the populations in it remain fairly constant.
The size of the populations in it vary dramatically.
The Arabian aryx has long horns to fight for territory. How could these have evolved?
Long horns gave a better chance of survival and reproduction
Only some aryx will have long horns, it is random
Long horns are caused by an additional chromosome
The alleles for long horns were not passed on
How is the Arabian oryx adapted to survive in the hot desert?
Large hooves to walk in the sand
Long horns help it to find water
Light colour to stay warm
Identify the producer.
Predator
Grass
Rabbit
Fox