Biodiversity is a measure of how many different species live in an ecosystem. Sampling occurs when scientists look at part of a population to draw conclusions about the whole.
What is the name for an organism that scientists look for to determine levels of pollution?
Which of these is an indication of high levels of water pollution?
Which of these can be used as an indicator species for air pollution?
Why is it important to take a random sample when using quadrats?
To avoid bias
To make a fair test
To give accurate results
On a 200 m2 field 50 samples were taken and 35 slugs found. Estimate the population of slugs in the whole field.
A scientist is interested in how the distribution of plants change along a sand dune. Which method would they use to investigate this?
Why is biodiversity important for scientists?
It's an interesting topic
It's not important for scientists
As a potential source of new medicines
What is biological control?
Using chemicals to kill living things
Using one species to control the numbers of another
Controlling the biology of organisms
What do we call an organism which is introduced into an area that it does not naturally inhabit?
If a scientist captured and marked 44 trout in a lake and returned a week later to capture 22 marked trout and 28 non marked. Estimate the population of trout in the lake