Ecology Evolution & Human Impact

Which is true of ecology?

• organisms are independent and do not interact

• organisms do not interact with each but they do interact with the environment

• organisms interact with each other and their environment

• organisms interact with each other but not with the environment

Which statement best describes the graph?

• Populations eventually go extinct

• In a stable ecosystem, populations are kept within a certain range

• Environmental interactions are predictable

• Populations must be reduced by half to maintain stability

Each species in an ecosystem

• occupies a different niche

• inhabits a different environment

• is part of a different community

• lives in a different biosphere

If Pond A has 80 species, Pond B has 300 species, Pond C has 5000 species and Pond D has 4000 species, which pond is the most stable?

• Pond A

• Pond B

• Pond C

• Pond D

Which species could represent pioneer organisms?

• oak trees

• pine trees

• rabbit

• lichens

If the ecosystem is not altered, which stage is the most stable?

• grass

• pine forest

• shrub

• hardwood forest

Which two substances are exchanged between humans and plants?

• oxygen and carbon dioxide

• glucose and amino acids

• nitrogen gas and oxygen

• amino acids and carbon dioxide

Which is true about predator and prey relationships?

• the larger animal is always the predator

• the predator population drops if the prey population drops

• predator and prey populations go through succession

• both populations have the same carrying capacity

A fungus spore lands on an ant and uses its body as a place to grow and release more spores. In this relationship, the fungus spore is the

• host

• decomposer

• parasite

• autotroph

If only one organism benefits from a relationship and the other organism is not helped or harmed, the relationship is known as

• commensalism

• parasitism

• mutualism

• saprophytism