John works for Texas Instruments. His tasks involve traveling to nearby colleges, interviewing students for hire after graduation, selecting certain ones to be invited for an office visit, and acquainting them with the facilities. He is in which phase of the HRM process?a. Maintaining a certain level of human resources b. Developing and training human resources c. Human resources planning d. Orientation and employee relations e. Acquiring human resources

ocean expansion, global warming is melting icebergs and causing water levels to rise.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.