Which are characteristics of all protists? Check all that apply.

They are heterotrophs.

They have nuclei.

They live in moist environments.

They reproduce sexually.

They are unicellular.

The dissolved carbon dioxide in a lake is used directly by

Barbara's urinalysis indicated the presence of pus in the urine. this condition is known as

The most recent species from which two different species have evolved is a parent. a. True b. False

Why do we get ill when we get stressed?

The time between stimulation of muscle cells and force generation is called

Yellowstone National Park has an average of about 4500 bison living in it. The park covers 3472 square miles. What is the population density of bison living in Yellowstone?

The original regimen known as Pasteurization consisted of: 1. Heat at 100 degrees F for 60 minutes 2. Heat at 98.6 F for 30 minutes 3. Freeze at negative 32 degrees C for one hour following dessication 4. Heat at 62.8 degrees C for 30 minutes

Seedless plants can be vascular or non-vascular. True or False

What is the basis unit of structure and function of all living organisms?

Wrinkles and sagging skin in elderly individuals are the result of