April Review

6.12(D) Students observe an unknown species during a field study. They observe that the organism is multicellular, is autotrophic, and can reproduce both sexually and asexually. Which kingdom does this organism mostly likely belong to?

• Archaea

• Animalia

• Bacteria

• Plantae

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112.18.b.12.D

6.12(D) A group of students used this diagram to classify three organisms into different kingdoms. Which table correctly identifies the three kingdoms?

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112.18.b.12.D

6.12(D) Which list of characteristics describes organisms classified as animals?

• Unicellular, prokaryotic, autotrophic

• Multicellular, eukaryotic, heterotrophic

• Unicellular, eukaryotic, heterotrophic

• Multicellular, eukaryotic, autotrophic

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112.18.b.12.D

6.12(D) The characteristics of a particular organism are listed below.

In which kingdom should this organism be classified?

• Fungi

• Eubacteria

• Plantae

• Animalia

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112.18.b.12.D

7.10(B) A farmer digs a small pond in a pasture. The farmer adds young individuals from two species of algae-eating fish to the pond and plants some reeds around the edges of the pond. The farmer wants the pond to be a sustainable ecosystem.

Which of the following would be most helpful in increasing the pond ecosystem's sustainability?

• Decreasing the number of plant species around the edges of the pond

• Introducing older fish of the same species into the population of algae-eating fish

• Having a greater diversity of living organisms in the pond

• Adding gravel between the water and where the reeds are planted

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112.19.b.10.B

7.10(B) An ecosystem that is not sustainable can break down when a natural disaster occurs. The can lead to organisms in the ecosystem either leaving the area or dying off.

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 in narrower

• there are fewer species to be affected by environmental stresses

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112.19.b.10.B

7.10(B) Students in a science class visited four local ecosystems. The students observed the species present in each ecosystem and recorded their observations in the table.

Based on the observations, which ecosystem is likely to be the least sustainable?

• Ecosystem 1, because it has the fewest species

• Ecosystem 2, because it includes both aquatic and terrestrial species

• Ecosystem 3, because it has few predators

• Ecosystem 4, because it supports many animals

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112.19.b.10.B

7.10(B) Tropical rainforests have the greatest biodiversity of any type of land ecosystem. How does biodiversity contribute to the sustainability of an ecosystem?

• The presence of more species with different adaptations makes it more likely to survive.

• Greater genetic variation within species makes it more likely to survive.

• The presence of a variety of herbivore species that can feed on a large number of different producers.

• All of the above

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112.19.b.10.B

7.10(B) The food webs model relationships among the organisms in two ecosystems.

Which ecosystem would be more likely to survive if a disease killed the grasses?

• The forest ecosystem, because most of the animals can eat other organisms

• The grassland ecosystem, because several predators compete for food

• The forest ecosystem, because it has three top predators

• The grassland ecosystem, because it has many herbivores

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112.19.b.10.B

7.10(C) Primary succession occurs when pioneer species move into an area that has no plants. Which organisms are common pioneer species?

• Conifer trees and tall grasses with roots that loosen the soil

• Mosses and lichens that can grow on rocky surfaces

• Grasses and weeds that arrive as seeds carried by the wind and then germinate in rich soil

• Vines and shrubs that help prevent the erosion of shallow soil

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112.19.b.10.C