4/1 Do Now

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

• There would be a decrease in the small bird population.
• There would be a decrease in the grass/flowers population.
• There would be a decrease in the mice population.
• There would be an increase in the grass/flowers population.

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True or False. In this Food Web Pyramid which type of consumer gets only 10% of the energy stored in plants? Careful!

• Herbivore
• Carnivore
• Omnivore
• Secondary Consumer

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Mistletoe extracts water and nutrients from the spruce tree to the tree's detriment (harm).

• Mutualsim

• Parasitism

• Commensalism

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Lions and cheetahs prey on wildebeests that graze in grasslands. What effect would increase in rainfall have on wildebeests, cheetahs, and lions?

• The wildebeest would decrease and the lions and cheetahs would increase.

• The wildebeest would increase and the lion and cheetah would decrease.

• All 3 populations would increase.

• All 3 populations would decrease.

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All living things or organisms in an ecosystem are

• None

• biotic factors

• abiotic factors

If a prey population rises, how will the predator population be affected?

• The predator population will remain stabe.

• The predator population will rise with it.

• The predator population will fall.

• The predator population will fluctuate randomly.

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What is an ecosystem? 

• producing food from sunlight
• animals that live in certain areas
• living and nonliving things that interact in an area
• a person who studies an environment

All the members of one species that live within an area of an ecosystem is a?

• population
• community
• niche

Three different bird species live in the same tree, but competition rarely occurs.  How can this be explained?

• occupy different niches
• eat the same food
• have a limited supply of food
• live in the same part of the tree

Temperature, light, air, water, and soil are all  _____  parts of the environment

• alive
• biotic 
• abiotic
• living

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