Seth runs up 3 flights of stairs. the first climbs takes him 12 seconds. his second climb takes him 15 seconds. has the power done been affected?

Match the types of competition to their descriptions.

In the african savanna,more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls