A chemical substance produced in the body that controls and regulates

the activity of certain cells or organs is called a (n)

hormones

steroid

android

activator

The term used to identify conditions that are brief and severe is:

What type of pathogen is responsible for epidemics and pandemics

What body system is dependent on a constant supply of iron,?

What is the most likely mode of transmission for a trait that is not expressed in parents but is expressed by one half of the sons?

Contractions of skeletal muscle are involuntary. true false

Which derived characteristic is shared by at least four organisms? Large brain Lungs Mammary glands Placenta

Question 2 For an object to remain at rest, which of the following must be true? A. The forces on it are balanced B. There is no friction C. Gravity doesn't act on it D. The object has no mass

Identify another invertebrate chordate other than hagfish.

If an amino acid has a side chain (r group) that is charged (i. e. bears a full + or - charge), which amino acid group would it belong in?

If an object with a mass of 100 kg on earth is taken to a planet that has more gravity, how will this affect the object's mass and weight?