What is a homologous structure? A. A structure with similar shape but a different use
B. A structure that is only in index fossils
C. A structure that only exists in the embryo
D. A structure that has no use in the organism

Which structure in the cardiovascular system connect arteries to veins?

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.

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen