What is most likely the amount of energy available at a trophic level of tertiary consumers if the amount of energy available to secondary consumers in that food web is 200 kilocalories? 0 kilocalories

20 kilocalories

200 kilocalories

2,000 kilocalories

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)

The permo-triassic extinction event had a greater impact on the number of earth’s species than did the extinction event at the end of the cretaceous. question 4 options: true false