Which components make up the cardiovascular system? lungs, heart, and blood vessels
heart, blood vessers, and blood
heart, blood, and lungs
lungs, heart, and skin

Nucleic acid certain protein cell membranes certain carbohydrates

The sketch shows a rynchosaur, an extinct animal that is known only from fossils. there has been much debate about the classification of these creatures. some scientists suggest that they belong with primitive amphibians, and some think they are related to snakes and lizards.the data equally support both cases. which statement best explains how to draw a cladogram that includes the rynchosaur? draw the cladogram for amphibians. draw the cladogram for reptiles. draw two cladograms, both showing the traits, and leave it as a hypothesis. draw two cladograms, both showing the traits, and have scientists vote

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?