An example of a hierarchy of structure in animals (from more to less complex) is as follows: *
circulatory system --> vein --> capillary --> organelle
heart cell -> circulatory system -> heart --> heart muscle tissue
circulatory system --> heart --> capillary --> epithelial cell
heart --> heart muscle --> vena cava --> artery

How do water’s relative densities as a solid and a liquid differ from that of most other substances? water’s solid and liquid forms have different densities, while most other substances have solid and liquid forms with similar densities. water’s solid and liquid forms have similar densities, while most other substances have solid and liquid forms with different densities. water’s liquid form is less dense than its solid form, while the opposite is true of most other substances. water’s solid form is less dense than its liquid form, while the opposite is true of most other substances.

49 ! how are energy cycles and growth cycles related?

Define adaptation. why do organisms adapt? give an example.