What is happening in the second step of this lock and key model of an enzyme?
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Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from

Your sense of touch depends upon: a. direct contact b. heat chemical c. reactions d. pain