A:B: Primary successionSecondary succession C:D: BothNeither #4 *Volcanic eruptions breaking the surface of the ocean. *Lichens move in on an area of bare rock. These are examples of ________ _________.
A:B: Primary successionSecondary succession C:D: BothNeither #5 *Farmer plows a field and leaves it unattended. *Hurricane destroys a Coastline. *Forest re-grows after a forest fire. These are examples of ________ _________.
#6#6 Lichens grow on bare rock. Lichens break down the rock with a mild acid. A thin layer of soil is formed. Grasses begin to grow on the soil. Decaying organic matter forms a thicker layer of soil. Small shrubs begin to grow. Trees with deeper roots grow in the deeper layer of soil. A forest is formed. This process is an example of _______ ________. A.Primary succession B.Secondary succession
A:B: Primary begins on bare rock. Secondary begins when soil is already present. Secondary begins on bare rock. Primary begins when soil is already present. C:D: BothNeither #7 What is the major difference between primary and secondary succession?
A. Primary begins on bare rock. Secondary begins when soil is already present.
A:B: The area would re- grow starting with lichen The area would re-grow starting with grasses- trees-forest C:D: The area would never re-grow None of these #8 How would secondary succession affect an area that was destroyed by a hurricane?
B. The area would re- grow starting with grasses-trees-forest
A:B: Primary community Succession community C:D: Climax communityNone of these #9 An ecosystem that is in balance.
A:B: Increase temperatures Lower temperatures C:D: Slow the rate of plant growth B and C #10 How might a cloud of ash from a volcanic eruption that blocks out the sun effect ecosystems?
B.Lower temperatures C.Slow the rate of plant growth
A:B: It increases the number of types of species It prevents other species from arriving. C:D: It slows the rate of plant growth B and C #11 *Ecological succession helps to maintain equilibrium in an ecosystem. How would secondary succession help to restore equilibrium after a flood?
These are examples of _____ _____. A. Structural adaptation B. Behavioral adaptation #17 Fish swimming in a school Wildebeest traveling in herds Monarch butterflies migrating to MexicoSkunks active at night
A: B:: The meadow and pond have different ecosystems and overlapping ecosystems The Meadow and pond have only one ecosystem with fewer overlapping ecosystems C: D: Both None of these #18 You would find the most animal diversity in a meadow with a pond compared to a just a meadow. Why?
A. The meadow and pond have different ecosystems and overlapping ecosystems
A:B: Adapting to their environment is not important They must adapt to their environment C:D: BothNeither #19 What causes animals to be diverse or different from each other?
A:B: the nonnative animal has several natural enemies the nonnative animal has no natural enemies C:D: the nonnative animal can learn to behave like the native animals Neither #20 *A nonnative animal is introduced into a mature ecosystem. *The animal will increase in the new community if ____.
B. the nonnative animal has no natural enemies.
A:B: They decrease They increase C:D: Both Neither #21 *The weeds in this picture thrive and are able to take over the yard because it has no natural enemies. *What happens to the native plant species in this ecosystem?
A:B: Move to a different ecosystem Eat different food sources C:D: They would die None #22 In order for an ecosystem with high biodiversity to recover, what would organisms need to do if one food source became unavailable? Ex: In the left picture, the snakes begin to die from a disease.
#23 Look at the graph. The population of rabbits decreased greatly between points A and B on the graph. Explain why this change occurred. A disease, limited resources, or some other limiting factor caused the rabbit population to decrease to decrease.
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