The circulatory system requires the interactions of another body system to regulate and deliver blood. Which of the following actions in another body system contributes to the job of delivering blood? a. protection from pathogens
b. filtering of fluids
c. contractions of muscle tissue
d. secretions of glands

Acladogram is a branching diagram that represents suggested evolutionary relationships among organisms based on the presence of unique traits. a scientist discovers a new organism that lacks limbs and does not have a true backbone. the organism lays eggs to produce offspring and has a cartilage-like rod known as a notochord running along its dorsal surface. on the cladogram below, select the species to which the newly discovered organism is most closely related.

~fourth largest plate ~includes parts of the indian and atlantic oceans ~subducts below the eurasian plate on the west side ~ the arabian and somali plates form boundaries with it what is the name of the tectonic plate described above? a) african plate b) eurasian plate c) north american plate d) indo- australian plate

Someone me with this: a mineral' is determined by its actomic structure.