WorksheetsEcology Part 3 Night School
Total questions: 20
Worksheet time: 11mins
The extinction of species
is a problem only where topsoil and groundwater are limited.
is a problem limited to the tropics
has been accelerated by the activities of people.
will not be a problem in the coming century.
Ecosystem disruption
increases biodiversity
threatens the existence of thousands of species
has no effect on biodiversity
protects natural habitats
In an organism is only found in a certain area it is considered
extirpated
anchored
endemic
introduced
When an organism is no longer found in a certain area it has been
declared invasive
evaporated
declared extinct
extirpated
Protecting an entire ecosystem will ensure that
governments will set aside land
natural habitats and the interactios of many diferent species will be preserved.
existing parks and reserves will expand
captive breeding programs will succeed.
One of the greatest threats today to biological diversity is
ozone depletion
contour plowing
habitat destruction
old-growth forests
The goals of conservation biology include (choose as many as you like)
wise management of natural resources
protection of biodiversity
preservation of habitats and wildlife
introducing foreigh species into new environments
An endangered species is
all organisms at the top of the food chain.
a dangerous predator
a group of organisms in danger of extinction
a diseased animal
Which has become the biggest source of environmental change on Earth?
human activity
energy
conservation biology
habitats
Which of the following are threats to biodiversity (choose as many as you like)
habitat fragmentation
species preservation
biological magnification of toxic compounds
invasive species
As DDT moves up the tropic levels in food chains or food webs its concentration
increases
stays the same
is eliminated
decreases
The number of different species in the biosphere is called
habitat diversity
ecosystem diversity
genetic diversity
biodiversity
Birth and death rates remain low and stable; society enjoys fruits of industrialization without threat of ranaway population growth.
post industiral stage
industrial stage
pre industrial stage
transitional stage
Birth rates fall, as women are employeed and as children become less economically useful in an urban setting. Population growth rate declines.
industrial stage
post industrial stage
transitional stage
pre industrial stage
Concentrations of a harmful substance increase in organisms at higher trophic levels in a food chain or food web.
biological magnification
DDT ism
toxic inhibition
biological excessivity
Death rates rall due to rising food production and better medical care. Birth rates remain high so population surges.
pre industrial stage
post industrial stage
transitional stage
industrial stage
High death rates and high birth rates.
pre industrial stage
post industrial stage
transitional stage
industrial stage
Using renewable resources while ensuring that they are not depleted is a practice called
biological magnification
sustainable development
subsistence hunting
monoculture
One property that makes DDT hazardous over the long run is that DDT is
easily removed from the ecosystem
is deadly to plants
nonbiodegradable
an insecticide
Why would the zooplankton and small fish not be affected like the fish eating birds?
concentration of DDT decreases as it moves up the food chain
DDT is an insecticide and does not affect other organisms
The concentration of DDT is not high enough
The concentraiton of DDT is too high
