WorksheetsBiosphere Exam Review
Total questions: 20
Worksheet time: 10mins
In the energy pyramid shown below, the greatest amount of energy is transferred...
from level A to level B.
from level C to level D.
from level B to level A.
from level D to level A.
Which sequence shows a correct flow of energy in a food chain?
algae -> snake -> duck -> deer
grass <- grasshopper <- frog <- snake
fungus -> beetle -> algae -> mouse
grass -> grasshopper -> frog -> snake
Organisms that eat cows obtain less energy from the cows than the cows obtain from the plants they eat, because the cows...
convert solar energy for food.
store all of their energy in milk.
use energy for life processes and loses it to heat.
pass most of their energy to their offspring.
The food web below shows the relationships between native organisms in an ecosystem. A nonnative predator that feeds only on hawks is introduced to the ecosystem. How is the new predator most likely to affect the ecosystem?
Seed-bearing plants will become more abundant.
The grasshopper population will decrease.
The snake and the chipmunk populations will decrease.
The hawk population will decrease and the snake population will increase.
Data on the immigration and emigration of a fish species would be most helpful in determining which of the following?
biological magnification
interspecies competition
population growth of the species
predator-prey relationships
One biotic factor that limits the number of organisms a habitat can sustain is the...
availability of water.
level of atmospheric oxygen.
activity of decomposers.
amount of soil erosion.
The Iberian Lynx is a large cat that is native to Spain and Portugal. Over the last few decades, the lynxes main food source, rabbits, have contracted a deadly disease. How would this most likely affect the population of the lynx?
The lynx population would increase because they would become vegan
The lynx population would remain the same because they would adapt to eating other food.
The lynx population would increase because they would produce more offspring to make up the difference.
The lynx population would decrease since they will not have access to as much food.
A new volcanic island is produced off the coast of Iceland. What will most likely be the first species to grow there?
grasses
lichens
pioneer trees
weeds
A region of land near a river was flooded, which destroyed the wooded area. The flood also deposited a large amount of sediment on the land. Which organisms will be the first to repopulate the land?
birds
lichens
grasses
insects
Which of these statements is NOT true?
Primary succession happens when communities of organisms populate otherwise barren land.
Secondary succession happens in areas where organisms had previously lived.
Primary succession reaches a climax community in less time than secondary succession.
An example of secondary succession could be the reestablishment of living organisms after a forest fire.
Only about 10% of the available energy is passed on at each trophic level. If a producer has 10,000 joules of energy available, how much will be passed on to the tertiary consumer (4th level of an energy pyramid)?
1 joules
10 joules
100 joules
1,000 joules
Which of the following best explains the difference in the amount of available energy in the trophic levels of the desert ecosystem?
There is less energy available in the producers because their tissues are less dense than those at higher trophic levels.
There is more energy available in the second trophic level because less energy is needed for hunting compared to the higher trophic levels.
There is more available energy in the birds of prey because they have greater muscle mass for storing energy than organisms in lower trophic levels have.
There is less available energy in the fourth trophic level because of the loss of energy through metabolism in each of the lower trophic levels.
Why are there so few marine plants and phytoplankton that live at the bottom zones in the ocean?
The ocean floor contains many decomposers.
The bottom zones of the ocean are the photic zones where light cannot reach.
There is little oxygen at the bottom of the oceans.
The bottom zones of the ocean are aphotic zones where light cannot reach.
The pH of the water in several lakes in Norway and Sweden had decreased to below 5.0 due to an increase in acid rain. Which of the following is most likely to happen in these lakes?
the decline of several fish populations.
an increase in numbers of fish
an increase in the amount of primary producers
increased predator-prey relationships
Mullet are local estuarine fish that move in schools and feed on plankton and plant matter. Natural predators of the mullet include spotted sea trout, sharks, pelicans and dolphins. The graph below shows how the number of mullet in an area has changed over time.
Based on the data, one student concludes that a new predator was introduced into the area during this time period. Which of the following is a likely alternate explanation for the change in the mullet population?
mullet prey increased in the area
mullet parasites decreased in the area
the temperature of the area increased
the amount of aquatic plants in the area decreased
Nutrients are substances that an organism must obtain from its surroundings for growth and survival. In the ocean, nutrients for phytoplankton and algae consist of organic and inorganic compounds. The most common nutrients measured are phosphorus (P) and nitrogen (N). Phytoplankton and algae use phosphorus and nitrogen during the process of photosynthesis. Phosphorus is an important component of DNA, ATP, and cell membranes. Nitrogen is an important component of DNA, proteins, and enzymes.
Why would there be lower levels of nitrogen and phosphorus at the surface of the ocean?
The phosphorus and nitrogen are more dense than the water and fall to the ocean floor
The phosphorus and nitrogen are created in the deepest parts of the ocean causing there is be high concentration.
The phosphorus and nitrogen are phytoplankton and are eaten by larger organisms
Phosphorus and nitrogen are used by phytoplankton and algae at the surface for photosynthesis reducing the concentration of the elements.
Many marine organisms are highly affected by changes in salinity. This is because of a process called osmosis which is the ability of water to move in and out of living cells, in response to a concentration of a dissolved material, until an equilibrium is reached. In general the dissolved material does not easily cross the cell membrane so the water flows by osmosis to form an equilibrium. Marine organisms respond to this as either being osmotic conformers (also called poikilosmotic) or osmotic regulators (or homeosmotic).
If an organism requires a high salt concentration, where would it need to live?
Ocean
River
Estuary
Lake
If an organism could survive in an environment that had variable salt concentrations, where are all the locations it could live?
Ocean
Estuary
River
Lake
If an organism does not have the ability to move, but ends up in a salt concentration that it cannot tolerate what can you infer would happen?
The organism will move to area with a different salt concentration
The organism will survive and reproduce
The organism will die
The organism will change it tolerance
The chart below shows the lowest pH level at which four different types of organisms can survive. These organisms live in Lake Bluewater. Lake Bluewater typically has a pH of 7.2. Acid rain has caused the pH level of this lake to drop significantly within the past few months.
Based on the information, which organisms will most likely die if the pH level of Lake Bluewater decreases to 5.5?
clams
frogs
trout
all of these
