EOC: Ecology Recap (Human Impact)

Why do the populations of invasive species grow so quickly? 

• Invasive Species are native to an area. 
• Invasive species are prey to many animals.
• Invasive species have no predators.
• Invasive species keep the ecosystems in equilibrium.

Increased carbon dioxide may cause global warming by trapping more ____________ in the atmosphere.

• water
• gases
• heat
• water vapor

Which of these are fossil fuels? Select all fossil fuels listed.

• steam

• coal

• gas

• oil

Which of the following is contributing to an INCREASE in carbon dioxide in the atmosphere?

• deforestation

• photosynthesis

• oceans

• fertilizer and pesticide use

A group of the SAME SPECIES in an area makes up the

• community

• population

• ecosystem

• biome

A community is

• all the same species in an area

• all the LIVING THINGS (biotic factors) in an area

• all the living AND non living things in an area

• a large area with many ecosystems

Food is a limiting factor. What would happen to a snake population if all their food was killed off.

• the snake population would increase (go up)

• the snake population would stay the same

• the snake population would decrease

• there would be no change

Carrying Capacity is the largest population an ecosystem can support. What is the carrying capacity of the species shown in this graph?

• 2000

• 100

• 200

• 50

The phenomenon by which toxins concentrate in the organisms at higher trophic levels within an ecosystem is known as...

• Biotoxicity

• Biomagnification

• Eutrophication

• Predation

Which is a MAJOR cause of acid rain?

• spraying pesticides on crops

• burning fossil fuels for energy

• dumping sewage in rivers

• using Nuclear power stations