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WorksheetsUnit 6 Review: Organisms and the Environment
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
A good adaptation for living in a grassland would be -
a)
the ability to hibernate
b)
The ability of plants to grow very high to reach the sunlight
c)
thick, insulating fur
d)
The ability of plants to regrow after prairie fires
2.
Snails are classified into a much larger group of animals named mollusks, each having a unique file-like tongue called a radula. A close up view of the radula is above.Why would it be beneficial for you to have a snail in your aquarium?Why would it be advantageous for the snail to have a tongue with spikes of spikes?
a)
to scratch algae off or hard surfaces
b)
to enable the snail to move more easily in aquatic environment
c)
to extract extra food from gravel
d)
to effectively clean the surface of the water
3.
Adaptations help improve animal survival and reproduction. They can be behavioral or structural. Which choice describes an animal best suited for a cold environment?
a)
eyes and nostrils on the top half of the head, outer covering of scales
b)
special feet with flattened, webbed toes for climbing up smooth surfaces
c)
torpedo body shape for fast swimming
d)
Two layers of fur: inner layer insulates, outer layer sheds moisture and protect from wind
4.
Some desert animals are most active at dusk and dawn. This adaptation is MOST helpful for -
a)
preying on plant species
b)
finding new water sources
c)
avoiding high temperatures
d)
hiding from hungry animals
5.
A plant with broad, flat leaves is BEST adapted for —
a)
conserving heat in a tundra
b)
collecting water in a desert
c)
avoiding insects in a prairie
d)
absorbing light in a rain forest
6.
Which statement below best describes how biodiversity contributes to the sustainability of an ecosystem?
a)
A variety of plant and animal species allows for more survivors of a natural disaster.
b)
Having more species in an ecosystem allows the human population to increase in size.
c)
Low biodiversity reduces the competition for resources, which helps native species survive.
d)
Fewer species in the ecosystem reduces the likelihood that disease spreads through the ecosystem
7.
The Texas Mock Orange is a type of flowering plant that is only found growing naturally in Texas. Which of the following is the most likely reason that they only grow naturally in Texas?
a)
The type of animals that eat the Texas Mock Orange are not found in other environments.
b)
The amount of sunlight the Texas Mock Orange needs is not found in other environments.
c)
The type and amount of water the Texas Mock Orange needs is not found in other environments.
d)
The types of organisms that pollinate and help the Texas Mock Orange reproduce are not found in other environments.
8.
Sea anemones have a muscular disk that helps them cling to rocks.This disk helps a sea anemone —
a)
survive in the presence of bright sunlight
b)
withstand the force of crashing waves
c)
escape from hungry ocean animals
d)
survive the salt found in seawater
9.
A non-native plant is introduced into a diverse, mature ecosystem in equilibrium. Assuming that the non-native plant has no natural enemies and that it thrives in the ecosystem, how will it affect the community?
a)
The native species will become more like the new plant.
b)
The number of native species will decrease.
c)
The number of native species will not be affected at all.
d)
The native species will all become extinct.
10.
Which of the following situations contributes to the sustainability of an ecosystem?
a)
Increase in biodiversity
b)
Decrease in biodiversity
c)
Extinction of a population from the ecosystem
d)
Removal of many populations of organisms
11.
The food webs below model the relationships between organisms in two ecosystems. Which ecosystem would be more likely to survive if and the disease killed the grasses?
a)
The forest ecosystem, because most of the animals can eat other organisms
b)
The grassland ecosystem, because several predators compete for food
c)
The forest ecosystem, because it has three top predators
d)
The grassland ecosystem, because it has many herbivores
12.
A rainforest ecosystem supports a variety of plant and animal species. This variety of life helps to maintain a balance within the ecosystem. What is one possible explanation related to a variety of species within a ecosystem to the overall balance of the ecosystem?
a)
The variety of species helps support more abiotic factors.
b)
Each species meets a particular niche in the ecosystem.
c)
The variety of life allows for competition for resources among different species.
d)
The varied organisms increase the available space in the ecosystem.
13.
Bacteria that live on the deep ocean floor are able to survive without -
a)
water
b)
energy
c)
sunlight
d)
nutrients
14.
How does secondary succession help restore equilibrium to a region destroyed by a flood?
a)
It increases the number and types of species.
b)
It brings back species from extinction.
c)
It stops other floods from occurring.
d)
It decreases the rate of evolution.
15.
The structure of this type of beak helps a bird —
a)
tear flesh off of fruit
b)
grab fish out of the water
c)
crack open large nuts and seeds
d)
pick small insects out of tree bark
16.
The role of a pioneer species in primary succession is to change a bare habitat into one that is suitable for other organisms. A species that is responsible for primary succession in an ecosystem is most likely able to —
a)
survive any predator
b)
migrate during the wintermigrate during the winter
c)
live at high altitudes
d)
carry out photosynthesis
17.
Complete this statement.
The more diverse and ecosystem is -
The more diverse and ecosystem is -
a)
The more threatened its populations are
b)
the more similar the species will be
c)
the more stable it is
d)
The fewer varieties of species are present
18.
Clownfish, sea anemone, coral, sea urchins, sponges, and parrot fish are just a few examples of the large variety of organisms that can be found in a coral reef. The coral reef and its inhabitants are suffering due to several factors such as pollution, coastal development, sedimentation and destructive fishing practices. What would be the most likely result if some of the species in the coral reef are destroyed?
a)
Other organisms would move into the coral reef area.
b)
The coral reef would be allowed to flourish without so many fish and plants living in and around it.
c)
The coral reef would begin to deteriorate without the variety of fish and plants necessary to maintain balance.
d)
The waters surrounding the coral reef will become cool with the decreasing number of organisms living there.
19.
When producers inhabit bare rock in an ecological community it is known as —
a)
climax community
b)
secondary succession
c)
primary succession
d)
deciduous forest community
20.
When a tree falls into a dense forest, what changes are likely to take place?
a)
Lichens and moss inhabit the area.
b)
The rate of erosion increases.
c)
Saplings and small plants grow better in the sunlight.
d)
There is a marked decrease in the amount of available oxygen.
21.
Which of the following sequences MOST likely represents ecological succession on a recently abandoned wheat field?
a)
grasses - flowering plants - shrubs -native trees
b)
native trees - shrubs - flowering plants - grasses
c)
shrubs - grasses - native trees - flowering plants
d)
flowering plants - native trees - shrubs - grasses
22.
The figure above 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?
a)
development of a parking lot
b)
passing through of a glacier
c)
preservation of habitat
d)
occurrence of a forest fire
23.
A hurricane hits a coastal prairie and destroys the habitat. Years later there is an appearance of small plants with rapidly spreading roots.
This vegetation describes —
This vegetation describes —
a)
a micro-habitat
b)
primary succession
c)
secondary succession
d)
biodiversity
24.
Succession leads to a change in the plant species in an area over time. The final stage is the forest, which remains stable for a long time. Which of these BESTexplains why forest trees are the final stage in succession in this type of ecosystem?
a)
Trees are very large and use all available nutrients.
b)
Trees have deep roots and soak up all of the ground water.
c)
Trees are tall and make it hard for small plants to grow because they block the sunlight.
d)
Trees have many leaves and keep other plants from growing by using the available air.
25.
The diagrams above show an ecosystem during different stages of ecological succession. In which order will these stages occur, from earliest to latest?
a)
4, 2, 1, 3
b)
1, 2, 3, 4
c)
3, 1, 4, 2
d)
2, 4, 3, 1
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