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WorksheetsBiodiversity & Changes in Ecosystems
Total questions: 20
Worksheet time: 2hrs 40mins
Define biodiversity
variety of life in Earth's land, freshwater, and marine ecosystems
variety of ecosystems in a given area
the number of different species in a given area and the number of individuals of each species that are present
the variation of genes within a species or population in a given area
Define genetic diversity
variation of genes within a species or population in a given area
variety of ecosystems in a given area
system made up of all the living and nonliving things in a given area
disturbance in the environment conditions that cause genetic changes to occur in organisms
Define ecosystem diversity
variety of ecosystems in a given area
variation of genes within a species or population in a given area
variety of life in Earth's land, freshwater, and marine ecosystems
changes to an ecosystem that affect how the parts of it interact
Define species diversity
both the number of different species and individuals of each species in a given area
variation of genes within a species or population in a given area
variety of ecosystems that are in a given area
changes in an ecosystem that affect of the organisms interact with one another
Which statement best describes an example of low species diversity?
A population of frogs has a wide variety of skin colors
A marsh ecosystem is covered by a single species of cattail bulrushes
A state park includes multiple forest, wetland, and freshwater ecosystems
Which statement best describes an example of high species diversity?
A pond ecosystem is populated by a single species of frogs
A state park includes multiple forest and freshwater ecosystems with many different species of fish, frogs, and birds
A desert ecosystem is populated only by organ pipe cacti, camels, and armadillo lizards
What can biodiversity influence within an ecosystem?
how well the ecosystem recovers from a disturbance
how well the ecosystem grows after rain
how poorly the ecosystem responds to a drought
What will and abundance of resources often result in for an ecosystem?
growth of individuals and populations
grown of biosphere
decline of individuals and populations
decline of biosphere
Changes to an ecosystem's biodiversity can have a direct effect on humans because humans
inhabit all areas of the Earth's ecosystems
use only minerals from the ground to make things
depend on the Earth's natural resources
rely mostly on solar power for energy
A reduction in the variety of pollinating insects would negatively affect the plant populations that depend on them. Which of the following describes the most serious impact this would have on humans?
Plants that don't need insects to pollinate would die
Crops that humans use for food would be reduced
People would have to build new homes
There would be a decrease in the availability of soil
Image "B" shows more biodiversity than image "A". Why?
Because "B" shows more different species than image "A"
Because image "B" has less different species than "A"
"A" has a greater number of same species plants so this statement is wrong.
Both images show the same biodiversity
Information on brown tree snakes is provided along with information on the island of Guam. Brown tree snakes were first brought to Guam in 1950. The introduction of tree snakes has brought about changes to the ecosystem on the island of Guam. What is the best evidence of the change?
Several other species of snakes were known to live on Guam before 1950.
The population of lizards on Guam in 1960 was very small.
The longest brown tree snake ever found on Guam measured three meters in length.
Most of the military bases on Guam were closed in the 1980’s.
The chart lists data on four different projects designed to restore a wetlands habitat destroyed by human activity and a recent hurricane. The project that will be chosen will have to be low in cost, benefit the greatest number of species, and be popular with the local citizens whose taxes will sponsor it.
Project 1
Project 2
Project 3
Project 4
