Biology Exam

Which organisms are producers?

algae

After a forest fire, what is the most likely order in which these stages appeared?

charred stumps, grasses and shrubs, young evergreens and shrubs, forest

Members of two similar species occupy similar niches

competition

Which row in the chart below best identifies the relationship between the mice and the wheat?

consumer producer

Which organism is a primary consumer?

crustacean

Imported species often disrupt an ecosystem because in their new environment, they will most likely

have not natural predators/enemies

Which organism would most likely have a predator-prey relationship?

hawk and mouse

Which of the following is true of grass in an ecosystem?

it produces glucose from carbon dioxide and water

Which char correctly shows three of the organisms according to their roles in cycling matter in the marine food web

krill, fish, bacteria

Most likely order of succession in the repopulation of an area after a volcanic eruption

lichens -> grasses -> shrubs -> trees

Which is the usual sequence for ecological succession starting on the surface of bare rock?

lichens, grass, shrubs, conifers, decidious trees

Which factor promotes competition between organisms in an ecosystem?

limited resources

Both species of organisms in a lichen benefit from a symbiotic

mutualism

An organism that obtains its food at the expense of another living organism is known as a

parasite

Organisms that are always part of the relationship indicated by letter C can be classified as

parasitism

Which organism would have the most energy available if the organisms in this food chain were arranged in an ecological pyramid??

producer

Which statement best explains why the actual population growth is less than the potential population growth?

resources in the environment are limited

Frank and the other birds in this cartoon are classified as

scavengers (detrivores)

The pattern of plant growth is knows as ecological

succession