A keystone species is a species on which the persistence of a large number of other species in the ecosystem depends and whose impact on community structure is disproportionate to its relative abundance. Of the species tested in this simulation, which one is the most likely candidate for designation as a keystone species?
a. deer mouse
b. mesquite
c. prairie dog
d. ferret
c
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The primary domains were founded based on comparative ribosomal RNA gene sequencing
Indicate whether the statement is true or false.
The figure below illustrates a __________ reaction
that produces a __________. a. condensation; hydroxyls; polymer b. condensation; water molecule c. cleavage; water molecules; monomer d. rearrangement; water molecules; polymer e. rearrangement; hydrogen ions; polymer
Under normal conditions how much air from each breath is considered “dead space” air?
a. 0 ml b. 100 ml c. 150 ml d. 300 ml e. 500 ml
Geese are known to use the magnetic field of the Earth in navigating their twice yearly migrations. This is an example of which characteristic of life?
a. maintaining homeostasis b. reproduction and development c. interacting with the environment d. organization