Cedarian said that water can be created in a lab by burning hydrogen gas in air. He said that water is not a compound, because only hydrogen is used to make water. What is wrong with David’s statement? A. A compound only contains one type of element.
B. Hydrogen is made up of two different types of atoms.
C. Water was not the product formed when he burned hydrogen.
D. Compounds must contain two elements, and oxygen from the air was what combined with hydrogen to make water.

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

What are some characteristics of a free enterprise economy?

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except