What is the maximum number of covalent bonds a carbon atom can form with other atoms? a) 1 b) 2 c) 4 d) 6

When coal has reached it hardest, darkest form, it is called select one: 0 a. sub-bituminous b. lignite c. bituminous d. antrhacite next page

Cassandra made a venn diagram to compare and contrast the two stages of cellular respiration. which belongs in the area marked x? energy is released. oxygen is used up. glucose is broken down. carbon dioxide is used up.

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots