A
which of the following is a biotic factor?
a. rainfall
b. temperature
c. plants
d. sunlight
c. plants
ecology is best defined as the study of:
a. weather patterns
b. interactions among organisms and their environment
c. evolution of species
d. chemical cycles only
b. interactions among organisms and their environment
a limiting factor is:
a. any factor that increases population size
b. any abiotic or biotic factor that restricts population size
c. a nonliving factor only
d. a factor that affects only predators
b. any abiotic or biotic factor that restricts population size
tolerance refers to:
a. maximum number of organisms an ecosystem can support
b. ability of an organism to survive under various conditions
c. ability to compete for resources
d. four-season adaptation
b. ability of an organism to survive under various conditions
a group of the same species living together in the same area is a:
a. community
b. population
c. ecosystem
d. biome
b. population
a niche describes:
a. where an organism lives
b. what an organism eats
c. the role of an organism in its environment
d. the climate zone of the organism
c. the role of an organism in its environment
biomass refers to:
a. total number of organisms
b. total mass of living matter
c. amount of sunlight
d. amount of water available
b. total mass of living matter
transpiration occurs when water:
a. freezes
b. leaves plants as vapor
c. falls as precipitation
d. turns into groundwater
b. leaves plants as vapor
nitrogen fixation converts nitrogen gas into:
a. oxygen
b. nitrates
c. ammonium (NH4+)
d. carbon dioxide
c. ammonium (NH4+)
carrying capacity is:
a. maximum number of the environment supports
b. the fastest growth stage
c. the initial lag period
d. when births exceed deaths
a. maximum number of the environment supports
denitrification converts nitrates into:
nitrogen gas (N2)
describe mutualism
a relationship between organisms in which both organisms benefit
Herbivores eat:
only plants
the first trophic level consists of:
producers or autotrophs
arrows in a food chain show:
direction of energy flow
primary succession begins with:
exposed rock with no soil
Permafrost is found in which biome?
Tundra
the most biodiverse terrestrial biome is the:
Tropical rainforest
hydrothermal vents occur in the:
abyssal zone
wetlands are defined as areas:
saturated with water
population density refers to:
number of organisms per unit area
a J-shaped curve represents which growth model?
exponential growth model
species diversity refers to:
variety and abundance of species
overexploitation refers to:
excessive use of species with economic value
name a density-dependent factor
disease OR predation OR competition OR parasites