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WorksheetsEcology Notes RECAP Quiz
Total questions: 20
Worksheet time: 13mins
What is the primary source of energy for producers in aquatic ecosystems?
Chemical reactions
Sunlight
Heat from the Earth's core
Nutrients in the water
Which of the following organisms is a primary consumer in a marine food web?
Phytoplankton
Zooplankton
Sharks
Seaweed
Explain how a food chain differs from a food web.
A food chain is a linear sequence of organisms, while a food web is a complex network of interconnected food chains.
A food chain includes only producers, while a food web includes only consumers.
A food chain is found only in freshwater ecosystems, while a food web is found only in saltwater ecosystems.
A food chain is a complex network, while a food web is a linear sequence.
Identify the role of producers in the trophic pyramid.
They decompose organic matter.
They convert solar energy into chemical energy through photosynthesis.
They consume other organisms for energy.
They store energy in the form of fat.
Which of the following best describes a saltwater ecosystem?
An ecosystem with low salinity and high biodiversity
An ecosystem with high salinity and low biodiversity
An ecosystem with high salinity and high biodiversity
An ecosystem with low salinity and low biodiversity
What is the role of consumers in an aquatic food web?
They produce energy through photosynthesis.
They decompose dead organic matter.
They transfer energy by feeding on other organisms.
They fix nitrogen in the ecosystem.
Describe the process of bioaccumulation and its potential impact on top predators in an aquatic ecosystem.
Bioaccumulation leads to the dilution of toxins in top predators, reducing their impact.
Bioaccumulation results in the concentration of toxins in top predators, potentially causing harm.
Bioaccumulation has no impact on top predators as they are immune to toxins.
Bioaccumulation only affects producers and has no impact on consumers.
In a trophic pyramid, which level contains the most energy?
Tertiary consumers
Secondary consumers
Primary consumers
Producers
How does the concept of a trophic pyramid help in understanding energy flow in an ecosystem?
It shows that energy is evenly distributed among all trophic levels.
It illustrates that energy decreases as it moves up the trophic levels.
It indicates that energy increases as it moves up the trophic levels.
It demonstrates that energy is only present at the producer level.
What is the primary difference between a producer and a consumer in an ecosystem?
Producers decompose organic matter, while consumers produce energy.
Producers create their own food, while consumers rely on other organisms for food.
Producers are always animals, while consumers are always plants.
Producers are found only in saltwater ecosystems, while consumers are found only in freshwater ecosystems.
Which of the following best describes the term "trophic level"?
The position an organism occupies in a food chain
The total biomass of an ecosystem
The rate of energy transfer in an ecosystem
The diversity of species in an ecosystem
In this aquatic food web, which organism(s) eats the squid?
Seal and seagull
Blue whale
Seagull and krill
It has no predators
Label the Energy Pyramid
Which species in the food web would be subject to the greatest biomagnification of pesticides applied to the grasses?
Deer
Grasses
Grasshoppers
Hawks
Which item would be classified as an "abiotic factor" in an ecosystem?
Bird
Fungi
Ant
Rock
A community is different from a population by having what?
Communities have biotic and abiotic factors
Communities have one species living together
Communities have many different species living together
Community begins with one individual
How much energy is available to be passed on to the next trophic level in an ecosystem?
100%
90%
25%
10%
