The diffusion of gas inside the lungs is dependent on two liquids: water and surfactant. Without the surfactant lining the inner surface of the alveoli, what would most likely happen?

Which feature the Nacunday National Park is known for? A. river B. valley C. lake D. waterfall

The thermal convection that drives plate motion is caused by A. Subduction B. Gravity C. An unequal distribution of heat D. Sea-floor spreading and expansion

A mutation may be passed along to human offspring A) through mitosis only. B) through meiosis only. C) through both mitosis and meiosis. D) through neither mitosis nor meiosis.

What evidence did Alfred wager use to support his theory of continental drift?

Which of the following does NOT make movement in animals possible? A. the contraction and relaxation of muscle cells B. the contraction and relaxation of the brain C. the connection of muscles to outer coverings D. the connection of muscles to bones

Complete these questions to test your understanding of the structure and function of olfactory cells. 1. Structurally, olfactory neurons are unipolar neurons

During heart surgery, red blood cells are damaged. When the blood passes through the lymphatic system, these damaged red blood cells are trapped and broken down by macrophages.

When does the average person die?

Asexual reproduction usually takes more energy than sexual reproduction. A. True B. False

An invasive species has the same niche as the squirrel in the community shown here. rabbit fern o fox squirrel hawk What would be a likely result of the invasive species joining this community? O A.