What is the name of the first stage of photosynthesis?
Light reactions
Carbon fixation
Glycolysis
Respiration
What is the name of the process in which new species are created?
Mutation
Speciation
Sexual selection
Natural selection
What is an ecosystem?
All the animals and plants in a community
The biodiversity of an ecosystem
The organisms & the non-living factors they interact with
The place where an organism lives
Which of the following is NOT an example of a genetically-modified crop?
"Golden rice" containing Vitamin A
Tomatoes with a longer shelf-life
Large broccoli bred over many generations
Maize which can survive drought
What is the name of stage 2 of photosynthesis?
Transpiration
Respiration
Carbon fixation
Light reactions
What is the limiting factor of photosynthesis at "C"?
Light
Temperature
Light intensity
Carbon dioxide concentration
Organisms of the same species have similar characteristics and.....
produce animals
produce sterile offspring
produce fertile offspring
produce offspring
Non-biodegradable pesticides accumulate in food chains. As you go up the food chain toxicity:
Increases
Stays the same
Decreases
Which of the following is NOT a potential fate of the glucose produced during photosynthesis?
Converted to fatty acids and glycerol
Stored as starch
Used in respiration
Used to make cellulose in cell walls
Energy is lost from food webs as:
All of the above
Undigested material
Heat
Movement
During the light reactions, light energy splits water into which two substances?
Oxygen and carbon dioxide
Hydrogen and oxygen
Oxygen and carbon monoxide
Hydrogen and carbon dioxide
If all the mice were stolen what would happen to the birds?
The number of birds would stay the same
Nothing
Decrease in number
Increase in number
Which of the following is the first step in natural selection?
Advantageous genes are passed onto offspring
Mutations create variation
The best adapted survive
Some individuals die
Which of the following does NOT apply to mutations?
They are the only source of new alleles in a population
They happen in DNA
They are non-random
They are spontaneous
An alternative to using pesticides is:
Biological control
Eutrophication
Using fertiliser
Adding more of the pest's prey
Why might grass grow more abundantly in a field than in a wood?
The wood is too sheltered from the wind
The field has a higher light intensity for photosynthesis
Woodland animals eat all the grass
Sheep spend most of their time in the woods
How can errors be minimised when using a pH meter?
Wave the probe around in the air between samples
Wipe the probe between samples
Only use the probe during dry conditions
Use the probe several times in a row
What name is given to all the organisms of one species living in an ecosystem?
Omnivores
Community
Biodiversity
Population
A gazelle’s role is to consume grass and be preyed upon by the tiger. This is termed its....
Population
Community
Habitat
Niche
Which of the following is a biotic factor?
Competition
Light intensity
Moisture
pH
Which of the following is evidence that two animals are of the same species?
The cells of both species contain ribosomes
The can interbreed to produce fertile offspring
They have identical DNA
They look at each other knowingly
What is the limiting factor of photosynthesis at "A"?
Light
Carbon dioxide concentration
Light intensity
Temperature
Which of the following organisms could be termed as a "secondary consumer"?
Carrots
Owls
Mice
Rabbit
Which of the following is NOT a consequence of eutrophication?
Multiplication of bacteria
Increased biodiversity
Decreased oxygen concentration in water
Algal bloom
In the carbon fixation stage of photosynthesis, what combines with hydrogen to make glucose?
Oxygen
Carbon dioxide
Water
Starch
Name the omnivore in this food web.
Bird
Grass
Fox
Rabbit
Which type of competition occurs between members of different species?
Interspecific
Intraspecific
Which of the following resources would members of different species NOT compete for?
Food
Habitat
Light
Mates
Which of the following can be used to sample the ground invertebrates in a habitat?
Quadrat
Sweep net
Pitfall trap
Moisture meter
How can a representative sample of the plant species growing in a field be obtained?
Randomly place a quadrat at many locations around the field
Place one quadrat at a random location in the field
Only count species who are more than half in a square
Randomly place many quadrats in one corner of the field
Which pyramid represents: Grass > Zebra > Lion > Flea ?
Pyramid L
Pyramid K
Pyramid N
Pyramid M
What is the limiting factor of photosynthesis at "B"?
Light
Light intensity
Carbon dioxide concentration
Temperature
Which process causes evolution over time in response to changing environmental conditions?
Natural selection
Intraspecific competition
Photosynthesis
Respiration
What information does the presence or absence of an indicator species provide?
How many populations are present
How many species are present
How much pollution is present
How much competition is present
How can the reliability of light meter readings be improved?
Make sure you don't shade the light meter
Take one reading
Take one reading before and after sunset
Take several readings and obtain an average
Which of the following is NOT a barrier which may lead to speciation?
Behavioural
Ecological
Geological
Geographical
To increase nitrate content in soil, farmers add:
Pesticide
Nitrogen
Fertiliser
Lime
Which product(s) of stage 1 of photosynthesis is/are passed onto stage 2?
Hydrogen and oxygen
Oxygen only
ATP and hydrogen
ATP only
Which of the following is an abiotic factor?
Disease
Light intensity
Grazing
Predation
In which plant cell organelle does photosynthesis take place?
Mitochondria
Chloroplast
Nucleus
Vacuole