Exercise decreases the risk of catching a cold. What is the Independent variable and dependent variable ?*
O Exercise
O Catching a cold
Time of day you exercise

All living organisms are composed of a. only one cell. b. at least 100 cells. c. at least three cells. d. one or more cells.

How does natural selection change thephenotypes within a population over time?

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.