Stomatas are pores on the plant leaf that
control the flow of gases between the environment and the plant cells. this process the cells maintain a stable internal environment. which biology theme does this example represent

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

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.