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WorksheetsLearning Check #3 Retake- BMS
Total questions: 13
Worksheet time: 7mins
Which plant characteristics are common to primary pioneer species? (7.10C)
organisms with roots that act as wedges to slowly break apart rocks
organisms with one long, thick root that taps into deep water supplies
trees with exposed surface roots that trap soil and vegetation
organisms with a broad mat of surface roots that quickly soak up water
Wildebeests are cow-like animals with horns. They migrate in herds across Africa in search of the grasses they feed on. Wildebeests are prey for lions. A drought would most likely cause a herd of wildebeests to ___. (7.8A)
migrate further than usual
become more horse-like
begin to prey on lions
produce larger herds
In 1989, a coastal storm with hurricane force winds (70+ mph) struck the coast of the Alaskan Bay. The storm destroyed coral reef in shallow waters including fish spawning grounds, soil was washed away leaving plants along the shoreline without nutrients and fewer nesting areas for birds that lived on shore. Every form of life in the area was affected. Scientists have carefully studied the area and its species since the storm to determine both short-term and long-term effect. Which of the following was least affected by this catastrophic event? (7.8A/7.2E)
plants along the shoreline
coral reefs in shallow waters
migratory birds, like the black-footed albatross
mollusks, such as clams, that lived on the bottom of the bay
What is the relationship between ecological succession and equilibrium in an ecosystem? (7.10C)
ecological succession prevents ecosystems from ever reaching equilibrium
there is no relationship between ecological succession and equilibrium
ecological succession and equilibrium are the same thing
ecological succession helps maintain equilibrium in an ecosystem
Both primary and secondary succession begin with pioneer species that -- (7.10C*)
change the area and make it safer from predatory organisms
invade the area so that new organisms cannot be established
modify the area and allow larger and more complex organisms to appear
use up all the existing resources and prevent establishment of non-native organisms
The figure below shows the same ecosystem in Texas at two different times. Which of the following most likely caused the change of species shown in the figure? (7.10C)
development of a parking lot
passing through of a glacier
preservation of habitat
occurrence of a forest fire
A large volcanic eruption can produce a cloud of ash that can impact an ecosystem’s climate for months, sometimes years . If a volcano erupted in China, the cloud of ash that blocked out the sun for four months would most likely have which of these effects on the local ecosystem? (7.8A)
lower temperatures and slower rates of plant growth
higher temperatures on Earth and increased rates of photosynthesis
large amounts of precipitation and flooding of coastal areas
high rates of extinction among reptiles and amphibians
Which of the following events is most likely to cause an environmental disturbance in a grassland biome? (7.8A)
earthquake
volcanic eruption
hurricane
fire caused by lightening
A volcanic eruption covers a wide area of forest with ash, lava, and volcanic rock. Which of these describes the first stage/step of ecological succession that will begin to return biotic factors to the forest community and return it to its state of equilibrium? (7.8A)
the volcano stops erupting
the lava cools to form rock
lichens grow on the rocks
the rock melts back into lava
When a tree falls in a dense forest, what changes are likely to take place? (7.10C)
lichens and moss inhabit the area
the rate of erosion increases
saplings and small plants thrive in the sunlight
there is a marked decrease in the amount of available oxygen
A wildfire moves through a grassland area. All of the following are examples of how this would affect the local ecosystem, except ____.
increased nutrients in the soil
destruction of plant life and animal habitat
germination of seeds that require fire before maturation can occur
animals go into hibernation
Pioneer species such as lichen and moss inhabit an area after a major disturbance, such as a volcanic eruption. Over time, the area has more soil to support more complex plants, and the number of pioneer species decreases. Why does the number of pioneer species decrease? (7.10C)
the amount of available oxygen for cellular respiration is reduced and the pioneer species can no longer thrive
competition from more complex plants dcreases available resources and there are less rocks to be broken down by the pioneer species
the area is more susceptible to the wind and seeds are captured in the pioneer plants and germinate at a higher rat
the temperature is not as extreme as it was following the disturbance and fewer of the pioneer species reproduce
Some students take care of a vegetable garden. When it is time to plant in the spring, the students leave part of the garden empty in order to observe ecological succession. Which of these will most likely occur first? (7.10C*)
development of topsoil
growth of weeds and grasses
growth of trees and shrubs
development of a stream
