In a well-developed essay, explain whether the benefits of projects to dam rivers in the Columbia Basin have outweighed their costs.
Provide evidence to support your claim.

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

Asegment of dna that codes for rna and a protein is a

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.