What did Pavlov initially notice about the animals in his original research after conditioning took place? A. They could not smell their food if it was cold. B. They would only eat when he was feeding them. C. They refused to eat food out of a strange dish. D. They salivated even when food was not present. Please select the best answer from the choices provided A B C D.

the backbone of the dna and rna compound is sugar phosphate.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.