Photosynthesis is important to living organisms because it is a. the foundation of most food chains. b. the source of nitrogen gas in the air. c. how animals get carbon dioxide to breathe. d. the process that occurs in most ecosystems.

Which layer will become saturated first when rain falls?

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that a) the four organisms do not have a common ancestor. b) humans are more closely related to chimps than any other apes. c) chimps are more closely related to gorillas than they are to humans. eliminate d) there is no evidence if any relationship between the four branches on the tree.

Drag each tile to the correct location. match each trait that an organism displays to a reproductive strategy.