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If we think of the human body as a system, how does eating food relate to feeling hungry and to the digestive system?
A. Eating is only an input for the digestive system.
B. Eating is a feedback between hunger and digestion.
C. Eating is the purpose of the human body system.

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.

Alizard lives in a desert. which would be an adapation for this lizard?

Is a glacier nothing more than a huge mineral flowing downhill? be sure to defend your answer with facts.