In cellular membranes, why do the tails ends of the lipid molecules face toward each other

Which of the following best describes what happens to the body during REM sleep

A scientist is examining the role of an element found in fats and carbohydrates of living things. This element makes up 65% of human body mass. Which statement describes the element he is studying?

Carrie is swimming in the ocean. As she floats over a large wave, her mother calls to her from the beach. What does the ocean wave have in common with the sound waves produced by Carrie's mother? A. Both kinds of waves displace particles permanently.

Whats the relationship between cellular respiration and photosynthesis?

How much energy is lost when one organism consumes another organism

In plants that undergo double fertilization, the structure that forms to nourish the seed is called the a. endosperm. b. egg cell. c. gamete. d. cone.

Definition of Homeostastis

You can eat as many empty calories as you want during the day because they do not count towards your daily totals. a. True b. False

Inorganic nutrients that your body needs, usually in small amounts, are called

True or false: the pulmonary circuit pumps oxygen-rich blood from the heart to the rest of the body and then back to the heart.