ENERGY
Why does the amount of energy decrease as it moves up trophic levels?
A. Energy is absorbed by producers
B. Energy is lost largely through metabolic processes as heat
C. Energy remains constant throughout the ecosystem
D. Energy increases at higher trophic levels
Answer: B. Energy is lost largely through metabolic processes as heat
What is one effect of pesticide use on ecosystems?
A. Increases biodiversity
B. Recycles nutrients in ecosystems
C. Contaminates water and kills plants and animals
D. Balances population sizes
C. Contaminates water and kills plants and animals
What is one result of overfishing in marine ecosystems?
A. Increases fish populations
B. Leads to bycatch and disrupts marine ecosystems
C. Promotes biodiversity
D. Increases the amount of energy available in the ecosystem
B. Leads to bycatch and disrupts marine ecosystems
Which of the following human activities decreases the population of certain species?
A. Pollution
B. Overhunting
C. Urbanization
D. Recycling
B. Overhunting
What level of organization describes a group of organisms of the same species living in the same area?
A. Community
B. Population
C. Ecosystem
D. Biosphere
B. Population
Which of the following represents a primary consumer in a food chain?
A. Plants
B. Herbivores
C. Carnivores
D. Decomposers
B. Herbivores
How does urbanization affect ecosystems?
A. Creates more habitats for animals
B. Increases biodiversity
C. Displaces animals and increases pollution
D. Balances energy flow in ecosystems
C. Displaces animals and increases pollution
Which of the following human activities decreases the population of certain species?
A. Pollution
B. Overhunting
C. Urbanization
D. Recycling
B. Overhunting
As little as 10 percent of the energy at any trophic level is transferred to the next level; the rest is lost largely through metabolic processes such as heat.
TRUE or FALSE
TRUE
What contaminates water and kills plants and animals?
The use of Pesticide
Which level of organization is represented by the human heart?
Organs
What happens to the amount of energy at each trophic level as it moves through an ecosystem?
The amount of energy decreases
What leads to bycatch and disrupts marine ecosystems?
Overfishing
What trophic level do herbivores who feed on producers belong to?
Primary Consumers
What do you call the level of the biological organization that extends from the deepest root systems of trees to the dark environment of ocean trenches, to lush rain forests and high mountaintops?
BIOSPHERE
Why should we reduce pesticide use in agriculture?
Because it contaminates water and affects plants, animals, and human communities downstream.
What is a food chains?
A linear sequence of organisms where each organism feeds on the one below it.
What displaces animals and increases pollution?
Urbanization
What level of biological organization where it involves the reaction between living and nonliving components in a given area?
Ecosystem