test one Flashcards
relationship in which two different organisms live together often interdependently
symbiosis
symbiotic relationship in which one member benefits at the expense of the other
parasitism
a population is group of interacting populations of different species living together in the same are
false
trophic levels are feeding levels based on position in a food chain
true
organism at base of food chain are consumers and are higher up the food chain than producers
false
niche overlap results in competition
true
ecosystems are made up of the living and nonliving components of an environment
false
moderate winters and rainfall
temperate forest
warm temperatures and sufficient rainfall
tropical forests
extreme dryness
desert
low growing vegetation; permafrost
tundra
perennial grasses and nonwoody plants
grasslands
the carbon cycle is the movement of carbon atoms via natural processes such as
D. decomposition; photosynthesis; respiration
what makes an organism a keystone species
c. its loss would negatively impact the ecosystem and the community
which is NOT necessarily true of a keystone species?
d. they are the most abundant species in the community
which is NOT true of consumers
c. they are photosynthetic
producers are photosynthetic
true
a graph of the growth of the human population has what shape
a. j shape
the human population is growing exponentially largely due to
all of the above
the growth rate of a population is calculated from the ______for that population
B. difference between birth and death
which of the following conditions would lead to the fastest population growth
c. birth rate> death rate; immigration> emigration
removal of a predator from an ecosystem may do all of the following EXCEPT
allow prey populations to remain above carrying capacity