Which statement is true of both active transport and facilitated diffusion

a:Both require ATP

b:Both involve proteins in the cell membrane

c:Both occur in only one direction

d:Both move materials down a concentration gradient

Describe two negative effects that water pollution can have on the environment. Explain one way water pollution can be reduced.

George Palade's research group used the pulse-chase assay to dissect the secretory pathway in pancreatic cells.

Neptune has a diameter of 30,778 miles. What is its diameter in kilometers? (1 mile = 1.6 kilometers) A. 1,392,650 km B. 120,586 km C. 12,761 km D. 49,225 km

What is the storage and quick-energy forms of carbohydrates found in animals?

Which of the following processes removes carbon dioxide from ocean waters? A. Evaporation of water from the oceans B. Precipitation into the oceans C. Decay of dead marine organism D. Formation of shells of marine organism

What would most likely cause the future acceleration of the expansion of the universe? O radiation from the Sun O the existence of background radiation O the continued existence of dark energy O light shifts identified by the Doppler effect

What came about in the devonian period

When will a recessive trait be seen in an organism

The delicate, spongy bone located between the eyes and forming a part of the cranial floor beneath the frontal lobes of the brain and the upper nasal cavities is the?

If you visited a savanna you would most likely see