12. Which area of deep ocean research provides the most economic benefit?

a sea-floor spreading

b. oil resource

C. new habitats

d hydropower

Amistake occurs during mitosis of a muscle stem cell. how might this affect muscle tissue

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.