WorksheetsEcology Final Review
Total questions: 15
Worksheet time: 9mins
In the energy pyramid here, how much of the energy in each level gets lost as heat?
80%
90%
10%
20%
What is the correct order of changes during primary succession?
Climax community, consumers, producers, pioneer species
Soil, producers, consumers, climax community
New rock, pioneer species, producers, consumers, climax community
What is the order that plants grow to repopulate the area in primary succession, such as a glacier receding or a volcano covering land with lava?
Lichens → Shrubs → Grasses → Trees
Lichens → tree → shrubs→Grasses
Grasses → Lichens → Shrubs → Trees
Lichens → Grasses → Shrubs → Trees
How much energy is lost as heat between the trophic level of the producers and the primary consumers?
10%
50%
70%
90%
Which of these are examples of combustion?
Burning fossil fuels and trees
Decomposition
Diffusion
Cellular respiration
Which of these is an abiotic factor?
Competition between organisms for food
Seasonal variations in precipitation and temperature
Predators
Parasites that affects the host
Why is nitrogen limited when the atmosphere is 78% nitrogen?
It isn't limited
Not many organisms can fix nitrogen, which means turn it into a useful form
Nitrogen is so light that it floats above the rest of the gases in the atmosphere and most organisms can reach it
What would happen if all the producers in an ecosystem suddenly died?
Consumers would increase
Within a week, consumers would evolve the ability to do photosynthesis.
Consumers would die, causing their numbers to decrease
Controls what enters and exits the cell
Lipid bilayer (another name for cell membrane)
Cytoplasm
Nucleus
Ribosome
Some toxins and poisons accumulate in the tissues of organisms. Which trophic level has organisms with the most concentrated toxins?
Producers
Primary consumers
Secondary consumers
Top consumers
A lichen grows on rocks at base of a waterfall. What might be happening in this environment?
Primary succession
Secondary Succession
A volcano erupted
Moisture level around the waterfall increased
Cell membranes are semipermeable, which means that some things can go through the membrane, but some things cannot. If a membrane is permeable to iodine, but not permeable to starch, which molecules will move through the membrane
Only starch
Only iodine
Neither
Both
What would happen if an alien destroyed all the decomposers in an ecosystem?
The ecosystem would become more stable because there would be fewer organisms.
The ecosystem would become less stable because nutrients could not be recycled and returned to the soil
Nothing would change.
