In the 1900s, (ethologists/comparative biologists) were based in north america, while (ethologists/comparative biologists) were based in europe.

In the 1900s, Comparative Biologists were based in North America, while Ethologists were based in Europe. Hope that help!

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above

true is the