The structure of DNA's bases are held together by what type of chemical bond?

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight

The main ingredient of magma is a pahoehoe. b silca c dissolved gases d obsidian

Kate is studying the transformation from unicellular to multicellular organisms. which metaphor is the most appropriate to apply to the map of the timeline.