Xavier has been using a workout app to track his progress at the gym. lately, he has found that his average heart rate during aerobic workouts is 129. his lowest target heart rate is 137. which of the following will him get the most productive workout, based on the information he has gathered?

do anaerobic workouts only
do fewer aerobic workouts
increase the intensity of cardiovascular workouts
decrease the intensity of cardiovascular workouts

Vegetation that grows along the floors of tropical and temperate forests is called undergrowth. how is the undergrowth of a tropical rain forest most likely to differ from the undergrowth of a temperate forest? a. a tropical rain forest's undergrowth most likely experiences periods of dormancy during colder weather. b. a tropical rain forest's undergrowth most likely experiences periods of dormancy during rainy weather. c. the undergrowth of a tropical rain forest most likely requires less sunlight. d. the undergrowth of a tropical rain forest most likely requires more sunlight.

Classify the structures as homologous or analogous, depending on their structure and function.

Organisms may contain up to five levels of organization within their bodies. which level of organization is shown by the liver? a. tissue b. organ c. organism d. organ system