Which of the following best describes a properly controlled experiment

Explain why rainforests are important to western medicine.

The smooth muscle of the digestive viscera is innervated by the: lumber splanchnic nerves cephalic plexus pelvic nerves vagus nerves

The phototropic response to sunlight is a mechanism that evolved over millions of years. what advantage to the plant is there from this response to sunlight?

The pinkish hue of individuals with fair skin is the result of the crimson color of oxygenated hemoglobin (contained in red blood cells) circulating in the dermal capillaries and reflecting through the epidermis.

a student conducts an experiment to determine if ultraviolet light kills bacteria. his result do not support his hypothesis. we say that the hypothesis is

So if a horse is pregnant with a baby horse would it moves faster?

Of the following, which is the most accepted and accurate way to measure body fat

During the day what typically happens to air temperature?

How do you calculate the gradient?

The brain structure that controls unconscious but essential functions such as breathing and circulation is the