Ecosystems

Ecosystems

Multiple Select

Check all of the abiotic factors

• sunlight

• plants

• temperature

• rainfall

Multiple Select

Check all of the biotic factors

• sunlight

• plants

• animals

• bacteria

Multiple Choice

Rabbits in the field.

• population

• community

Multiple Choice

All of the organisms in a field.

• population

• community

Limiting Factors

Limiting factors restrict the carrying capacity of an ecosystem. There are 2 types: density dependent and density independent.

Multiple Choice

What impact do resources, such as sunlight and water, have on a forest ecosystem?

• They limit the carrying capacity of the ecosystem.

• They increase habitat areas for new organisms entering the ecosystem.

• They decrease the number of diseases resulting from overpopulation.

• They alter the rate of photosynthesis, resulting in more oxygen being produced.

Symbiotic Relationships

• mutualism-both organisms benefit

• commensalism- one organism benefits and the other is neither harmed or benefitted.

• parasitism- one organism benefits at the others expense

• predator-prey

Multiple Choice

Which is an example of parasitism?

• cat and mouse

• tadpole and frog

• human and tapeworm

• caterpillar and butterfly

Multiple Choice

Bees and butterflies help pollinate plants, enabling them to reproduce while getting nectar from those plants. Which is best represented by this relationship?

• mutualism

• commensalism

• predator-prey

• parasitism

Open Ended

Why is only 10% of energy in a food chain transferred from one trophic level to the next?

Multiple Choice

Where is the largest amount of energy in the food web?

• hawk

• grass

• mouse

• grasshopper

Multiple Choice

Which organisms provide the important link in Box A from dead organic matter to matter from the environment?

• autotrophs

• decomposers

• parasites

• photosynthesis

Multiple Choice

Which best describes the role of krill in this food chain

• producers

• decomposers

• primary consumers

• secondary consumers

Multiple Choice

In which process is nitrogen from the air put into a form that plants can use by bacteria?

• nitrification

• denitrification

• nitrogen saturation

• nitrogen fixation

Multiple Choice

Which statement can be logically concluded about the food web shown?

• Organisms 1 is most likely a type of bacteria.

• Organism 2 is definitely an omnivore.

• Organism 5 is most likely a plant eater.

• Organism 8 is definitely a carnivore.

Multiple Choice

Which most likely occurs in the area where the tree falls that helps the plants and shrubs grow taller?

• a decrease in competition for sunlight

• a decrease in the amount of rainfall

• an increase in herbivore population

• an increase in soil fertility

Multiple Choice

Which is MOST likely a direct cause of an ear infection?

• loud noises

• foreign bacteria

• wearing tight hats

• dirty ear canals

Multiple Choice

The human immunodeficiency virus (HIV) causes AIDS. The first known human cases AIDS were in Africa in the late 1950s. Since then, tens of millions of people have died from the disease, and tens of millions more people all over the world are infected. Which term BEST describes the disease AIDS?

• isolated cases

• outbreaks

• epidemics

• pandemics