What percentage of the land on earth is usable, for living on, but not for agriculture/farming?
b. what percentage of the land on earth can be used for agriculture/farming?
c. what percentage of the earth's surface is covered by land?
d. what percentage of the earth's surface is covered by water? (from data table on work file)
e. what percentage of land on the earth's surface is inhospitable lands.

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.

Tides that occur during the new and full moons

Reactants undergo chemical reaction to form products. this chemical equation represents one such reaction. the coefficient for one of the reactants or products is incorrect. which part of the chemical equation is incorrect?