The mammalian heart has: a. 4 chambers b. 2 chambers c. a two-sided muscular pump d. four-sided muscular pump e. a and c f. b and d

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics