7th Grade Science EOY Exam 2018-2019 Part 2

Which structures perform similar functions in plant and animal cells?

• mitochondria, nucleus, cell membrane

• vacuole, chloroplast, cell wall

• cell membrane, cell wall, nucleus

• ribosome, cell membrane, chloroplast

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Solange found a bird that fell out of its nest. She used a dichotomous key to help her decide which type of bird she found and what it eats. She concluded that the bird she found eats grub worms.

What information about the bird led her to this conclusion?

• The bird has talons and a short, pointed beak.

• The bird has webbed feet and a throat pouch.

• The bird has webbed feet and a short, round beak.

• The bird has talons and a long, pointed beak.

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The movement of colored water through the gravel best models —

• condensation of water vapor

• surface runoff of precipitation

• conservation of water

• pollution of groundwater

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How will the rusting barrels in this stream affect the surface water in the watershed

ecosystem?

• The barrels will drop the temperature of the surface water that reaches the river.

• The barrels will alter the course of the surface water that reaches the river.

• The barrels will pollute the surface water that reaches the river.

• The barrels will filter the surface water that reaches the river.

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After a volcanic eruption, lava covers the land. What is the order that plants grow to repopulate the area?

• Lichens → Shrubs → Grasses → Trees

• Lichens → tree → shrubs→Grasses

• Grasses → Lichens → Shrubs → Trees

• Lichens → Grasses → Shrubs → Trees

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Which of the following is most likely the order of succession after a forest fire?

• Grasses → shrubs → softwood trees → hardwood trees

• Grasses → softwood trees → shrubs → mosses and lichens

• Mosses and lichens → shrubs → softwood trees → hardwood trees

• Bare rock → grasses → shrubs → hardwood trees

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Which answer best describes the transfer of energy as it moves up the energy pyramid?

• The amount of energy gets larger as you go up the pyramid.

• The amount of energy gets smaller as you go up the pyramid.

• The amount of energy stays the same as you go up the pyramid.

• The amount of energy renews itself 100% as you you up the pyramid

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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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Increased biodiversity results in a more

sustainable ecosystem because —

• a greater number of plant species means that there is less barren land

• a greater variety of species present allows more organisms to adapt after changes occur

• the transition area between two ecosystems is narrower

• there are fewer species to be affected by environmental stresses

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With many varieties of plant and animal species, the most productive biomes on Earth that have the greatest biodiversity are —

• deserts

• temperate grasslands

• steppes

• tropical rainforests

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