Stickleback evolution lab final quiz 2. what happened to these fish as they adapted to living exclusively in fresh water? over many generations, populations of fish changed in many different ways, including in their skeletons. they acquired new characteristics by mating with fish that lived in these lakes. since the new environments were so similar to their old environments, their traits changed. the new environments caused individual fish to change within their lifetime.

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.

Question 17 (1 point) where does penicillin come from? a. it is a chemical that man invented b. it is a fungus c. it is a toxin made by other bacteria d. it was discovered in archaebacteria

When sodium chloride dissolves in water the sodium cholride dissociates into?