In 1950 Erwin Chargaff published a scientific paper showing the percentages of the nitrogen bases adenine (A), thymine (T), cytosine (C), and guanine (G) in the DNA of different types of organisms. His analysis of the data revealed key understandings about the structure of DNA. An analysis of an octopus's DNA determines that the nitrogen base thymine makes up 18 percent of the genome. Which of the following best represents the percent of guanine Chargaff would have found in the octopus's genome? A 18% 32% C 36% D 64%

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Learning and memory

Learning is defined as a relatively permanent and irreversible adaptive change in behavior. It always results from experience. The ability of an organism to store and recall the effects, sensations, and knowledge gained through learning and experience is called memory.