Amphetamine is a drug that suppresses appetite in most animals. To study the magnitude of this effect in rats a scientist randomly assigned thirty rats into three treatment groups to receive either a dose of amphetamine (2.5 or 5.0 mg/kg) or a control (saline, 0 mg/kg). Then food consumption was measured in grams per kilogram of body weight (g/kg) for the three-hour period after the injection. A) Which of the choices on Canvas best represents the null/alternative hypothesis of this study?

µ1 = µ2

µ1 ≠ µ2

µ1 > µ2

µ1 < µ2

µ1 ≥ µ2

µ1 ≤ µ2

θ1 = θ2

θ1 ≠ θ2

θ1 > θ2

θ1 < θ2

θ1 ≥ θ2

θ1 ≤ θ2

ρ = 0

ρ ≠ 0

β = 0

β ≠ 0

The residuals of these data are consistent with a normal distribution.

These residuals of these data are not consistent with a normal distribution.

The variances of the response/residuals are the same for all values of x.

The variances of the response/residuals are not the same for all values of x.

You decide that the introduction should also discuss the extremophiles that are referred to as the archaea. these single-cell organisms are considered "extremophiles" due to their ability to survive and reproduce in environmental conditions that would be hostile for most living organisms. archaea species have been isolated from highly acidic sulfur springs, ocean floor thermal vents with temperatures that exceed boiling, and subarctic ice well below freezing. while still considered to be prokaryotic, the archaea have numerous differences that place them apart from the bacteria. choose the characteristics that separate the archaea from other prokaryotic cells. select all that apply. view available hint(s) select all that apply. archaea lack true peptidoglycan in their cell walls. the morphology of the cell is rigid and is geometric in shape, similar to a sphere or cylinder. the cytoplasmic membrane lipids of archaea have branched or ringform hydrocarbon chains. all currently identified and characterized archaea have been linked as the causative agent to an animal or human disease.

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?

Which skeletal system is represented by the shaded portion of the skeleton? spongy skeleton compact skeleton axial skeleton appendicular skeleton