What is the variable a scientist changes on purpose?

A. Control group

B. Constant variable

C. Dependent variable

D. Independent variable

Which statement best describes the function of the respiratory passageways of a human? A) They permit digestive end-products to make contact with body cells. B) They permit exchange between the external atmosphere and the circulatory system.

Which statement about fetal development is not correct? - a developing individual is called an embryo at week 2 - an embryo is a product of mitosis and cell division -a blastocyst contains about 500 cells

What happens if you attempted to perform gel electrophoresis on the sample from the agar electrophoresis? (without doing PCR)

Explain the direction in which the mRNA transcript is manufactured

What is the end of menstruation called? a. Climacteric b. Menopause c. Menarche d. Amenorrhea

Why are carbohydrates important to organisms?

When the plates at a transform boundary lock together as they slide past one another ... A. a mountain is created B. a volcano forms C. intense energy will build up, eventually causing an earthquake

Which property allows water to stick to glass?

Your two month old baby isn't sleeping through the night. your mother-in - law advises you to put rice cereal in the baby's bottle before bedtime. do you follow her advice?

You should always dispose of lab chemicals