Hy are there different theories about the effects of global warming? a. there is no data to support global warming. b. global climate is complex, so changes in global climate are hard to predict. c. increased levels of carbon dioxide are offset by other changes. d. there has been a decrease of extreme weather.

Select the correct answer. which term do biologists use to describe the average number of individuals of a species per unit area? a. carrying capacity b. population density c. minimal viable population d. survivability curve

Post test: evolutionselect the correct answer. in a particular mouse species, two extremes of a phenotype arethese two phenotypes begins to increase over the preexisting npopulation attenatural selecio

The following diagram shows a cross section of the stem of a plant. this diagram implies that: a. cells within multicellular organisms perform the same function. b. cells within multicellular organisms are interchangeable. c. cells within multicellular organisms look the same. d. cells within multicellular organisms are different.