The fossil evidence found in these sedimentary layers best implies that a) land plants evolved from algae. b) land plants evolved after marine animals. c) vertebrates and invertebrates evolved together. d) land plants and land animals evolved at the same time.

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box