8th grade science STAAR review 4

Why might an organism have more than one arrow coming from them in a food web?

• More than one organism may eat them. 
• They may eat more than one other organism. 
• This organism gets its energy from multiple sources. 
• They have no resources available to them.

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An organism that needs to eat other organisms to obtain energy is known as a:

• Autotroph
• Producer
• Consumer
• Mutualist

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Consumer that eats plants

• heterotroph
• herbivore
• producer
• community

What does a biotic do?

• do nothing
• move, repopulate, and live
• stand still
• dead things

if an eagle/hawk population goes down what happens?

• predators are booming
• nuke
• Mouse population explodes
• nothing

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What does a limiting factor do?

• makes a population grow large
• stops a population from growing large
• helps organisms adapt to abiotic factors
• provides geographical boundaries for migration

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If a disease were to infect frogs and kill them off what would be the likely impact of this system?

• Decrease the amount of flies
• Increase the amount of frogs
• Decrease the amount of algae
• Increase the amount of algae

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anything that an organism needs to live, ex. food, water, space

• carrying capacity
• resource
• succession
• denitrification 

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Biodiversity refers to

• extinct species
• the variety of species on Earth
• nonrenewable resources
• the rate of species decline

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A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?

• Coleoptera
• Heteroptera
• Diptera
• Lepidoptera