4. nutrients move through ecosystems in different ways. which nutrient cydes through organisms, rivers, rain, and the atmosphere?
water
vitamins
carbon
phosphorous

How can you approximate the number of calories required to keep you in energy balance?

Control of the body is accomplished by which of the following body systems? nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems

Blood stem cells may develop into any kind of human blood cells. what kind of stem cells are blood stem cells? a. multipotent stem cells o b. totipotent stem cells o c. pluripotent stem cells o d. unipotent stem cells