The ‘endogeneous (circadian) period’ of an organism can be measured by: Placing them in ice cold water for 5 minutes, removing them, and taking their temperature

Recording how often they eat throughout the day

Placing them in constant darkness, constant temperature conditions and measuring their physical locomotor activity

Determining how long it takes before they enter the REM stage of sleep after progressing through NREM phases

Ascientist conducted an investigation about the effects of diet on disease resistance in rats and made surprising observations. the mice with a genetic ear mutation seemed to show similar patterns of resistance compared to mice with normal ears. based on this information, what will most likely occur? a. she will perform a second investigation on the role of certain genes in disease resistance. b. she will revise her hypothesis to pertain to mutations rather than diet, and update her data accordingly. c. she will use this information to determine that her original question was nonscientific, so she will revise it. d. she will determine that her hypothesis was invalid because resistance must be genetic.