Apes Unit 8 Review

The pesticide Atrazine is a(n)

• neurotoxin

• mutagen

• endocrine disruptor

• viral disease spread by mosquitoes

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Which a point source of pollution?

• a factory smokestack

• runoff from city streets

• pesticides from agricultural fields

• fertilized from urban lawns

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How are temperature and dissolved oxygen connected?

• warm water has less dissolved oxygen

• cold water has less dissolved oxygen

• there is no relation between temperature and amount of oxygen

How does temperature and dissolved oxygen result in algae blooms?

• low oxygen kills fish, which decompose and produce nutrients for algae

• increased temperature increases waste from fish, which provide energy for algae

• increased temperature and less dissolved oxygen make fish move, decreasing competition so algae can grow

• Increased temperature leads to more dissolved oxygen, which helps algae grow

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Why would something be considered a persistent organic pollutant (POP)

• its stable and stays in the environment

• it controls diseases spread around the world

• it can be found in food and is toxic to those that eat it

• it has both short and long term health effects

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What would be a possible consequence of endocrine disruptors that have runoff into a lake?

• increased food web interactions

• increased dissolved oxygen

• increase in birth defects of fish

• decreased turbidity of the water

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Why are persistent organic pollutants (POPs) so harmful?

• they confuse birds during flight because of noise pollution

• they are soluble in fat so they accumulate in organisms

• they release radioactive materials in water

• they release greenhouse gases into the atmosphere

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Which would cause eutrophication?

• increased recreational use of a lake

• cooler temperatures in an area

• phosphorus from runoff

• increase in fish populations

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Releasing lots of sewage and organic wastes will result in

• increase in biological oxygen demand

• increase in dissolved oxygen

• decrease in bacteria

• decrease in water temperature

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What is true of a lake that is experiencing eutrophication?

• decreased algae

• increased nutrients

• decreased sediments

• increased oxygen

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