Our Effects Quiz

A  the dominant herbivorous organisms of a region

B  global patterns of atmospheric circulation

C  global patterns of oceanic circulation

D  the intensity of a solar radiation

A  The level of resources in the habitat will increase equally

B  Both a) and d) are possible

C  The population will slowly decline until it reaches its carrying capacity and fluctuate at about that number

D  The carrying capacity will increase

E  The population may shoot past its carrying capacity too quickly and then crash

A  10,000

B  10

C  100

D  100

E  2,000

A  photosynthesis by plants and phytoplankton removes substantial amounts of atmospheric nitrogen

B  nitrogen forms the framewok for organic molecules essential to all organisms

C  nitrogen is a major constituent of phospholipids, ATP, and other energy-storing molecules

D  nitrogen is a component of amino acids, proteins, and nucleic acids.

E  The nitrogen cycle is NOT important biologically: the atmosphere is composed of 78% nitrogen, so nitrogen is freely available to all living organisms regardless of where it is in its cycle

A  sugars

B  enzymes

C  substrates

D  work

A  on an island that has just risen out of the ocean

B  in a forest that had burned to bare ground

C  on the surface of recently cooled lava

D  on bare ground exposed by the retreat of a glacier

A  All cells must have chloroplasts in order to survive

B  All other organisms require carbon dioxide for life processes

C  Photosynthesis captures energy that other organisms access when they eat either plants or organisms that eat plants

D  The sugars made during photosynthesis are building blocks of DNA

A  oscillating cycle

B  S-shaped population curve

C  C-shaped population curve

D  J-shaped population curve

A  deserts

B  temperate forests

C  estuaries

D  tropical forests

A  Prey species, such as mussels, would decline, but most species within the community would be unaffected.

B  The communities would be statistically indistinguishable from one another.

C  Other predators will simply replace P.ochraceus and take advantage of prey that P.ochraceus consumed

D  Sea star prey, such as mussels, might increase in abundance and crowd out other community members

A  CO2 reacts so quickly with other compounds that it should not be occurring

B  it has occurred relatively rapidly

C  there is no known mechanism for its occurrence

D  it has occurred relatively slowly

A  provided by carbon dioxide

B  extracted from DNA

C  oxidized to make sugars

D  provided by enzymes

A  cause the abundance of their prey to rise

B  quickly alter the behavior of their prey

C  drive their prey to extinction

D  restrict the distribution of their prey

A  Seeds and grasses are eaten by various insects and small herbivores, the insects are eaten by a meadowlark, the small herbivores are eaten by a hawk, the meadowlark and the hawk eggs are eaten by snakes, and the snakes are eaten by owls.

B  Goats eat grass; the goats are milked and eaten by humans

C  Seeds are eaten by sparrow, the sparrow is eaten by a hawk, and the hawk’s eggs are eaten by a snake.

D  Seeds are eaten by a tufted titmouse, the titmouse is eaten by a hawk, the hawk eggs are eaten by snakes, and the snakes are eaten by owls.

A  exponential growth

B  logiistic growth

C  density-dependent

D  density-independent