Biodiversity and Dangerous Plants/Animals Review

How does an invasive species affect an ecosystem?

• The invasive species interacts with all of the organisms in a non competitive way

• The invasive species travels within multiple ecosystems or habitats to find food

• The invasive species solely depends on birds for its food supply

• The invasive species can disrupt biodiversity and food webs by competing with or harming species native to that ecosystem

What is the best definition of an ecosystem?

• A system that consists of all of the abiotic and biotic factors that occur within an environment

• A group of individuals of the same species that occupy the same area and interact with each other

• organisms and the physical environment in which they live

• The populations of all the species that occupy the same geographical area 

Which example refers to an abiotic factor?

• trees growing

• animals surviving in an ecosystem

• fish swimming in an ocean

• oxygen dissolving in the water

What is the major cause of extinction today?

• hunting

• habitat destruction

• poaching

• disease

A short definition of biodiversity is

• extinct species

• the variety of species on Earth

• nonrenewable resources

• the rate of species decline

Some species are so important to the functioning of an ecosystem that they are called:

• cornerstone

• essential

• keystone

• exotic

Where on Earth are most extinctions currently occurring?

• deciduous forests

• tropical rainforests

• taigas

• beaches

Which of the following most likely supports the most sustainable ecosystem?

• the habitat with the greatest number of consumers

• the habitat with the warmest average temperature

• the habitat with the greatest variety of living things

• the habitat with the greater number of green plants

Why is biodiversity important in fighting disease from food crops?

• It prevents one disease from wiping out an entire food crop

• It prevents habitat loss of native species

• It provides different foods for different populations

• It prevents fungal disease from wiping out corn crops

Why is biodiversity so important?

• Honestly, I have no idea what biodiversity is!

• Because it's better to have only a few species on Earth

• Because it's better to only have one variation of species

• Because all species depend on each other to survive so if one species goes extinct another that depends on it could go extinct as well