What holds the two strands of DNA molecules to each other. Hydrogen Bonds
Phylogenetic
Scientist use a phylogenetic tree to track the evolutionary history of a species.
The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
Dorsal means back as in the back area. Example~ Many dolphins have a pronounced beak and all have a central dorsal fin and sharp teeth for feeding, mainly on squid and fish.
