Which of the following kinds of environmental problems is irreversible? a. water pollution b. extremely high atmospheric carbon dioxide levels c. polar ice pack melting d. species extinction

Name three things the framers of the constitution did to keep the federal government or any part of it from becoming too powerful.

2. every fitness program should include a. a longer warm-up period than cool-down period. b. a warm-up, a primary conditioning period, and a cool-down. c. at least 60 minutes of cardio activity. d. at least 15 minutes of vigorous activity.

Which worm is described by these characteristics? - is part of the phylum nematoda - has nostrils but no eyes - moves its body by bending from side to side