How long do you need to exercise every week?

Although animals share many common characteristics, there is also a great amount of diversity found in animals. which animals are ectothermic, obtain dissolved oxygen in water through gills, have scales, have fins, and live in water?

Which word can describe a person's gender identity? a) female b) intersexual c) asexual d) androgynous

The heart and lung are located in which cavity ? thoracic