Which of these is an example of the process of speciation?
A. Two distinct populations of fish begin to share the same habitat but do not interbreed.
B. One population of lizards is split into two similar populations that continue to interbreed.
C. One population of mice is split into two distinct populations that cannot interbreed.
D.
Two similar populations of birds continue to share the same habitat and interbreed.

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg 

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms