Why does water need a protein channel to move across the cell membrane?

Which of the following is a biotic component of an ecosystem? sunlight a dead insect rocks temperature

What type of stress is tension and at what type of plate boundary is it found?

How can a lemon be alkaline if it's full of citric acid?

If the velocity of an object is changing, its momentum is also changing?

The production of ammonia in the reaction catalyzed by glutamate dehydrogenase: A. requires the participation of NADH or NADPH. B. proceeds through a Schiff base intermediate. C. may be reversed to consume ammonia if it is present in excess. D.

Drake is comparing time people spend playing games on Xbox versus Playstation. In his study, individuals ages 10 - 15 are given Xbox's and individuals ages 16 - 25 are given Playstations.

How do scientists obtain knowledge about the world? Check all that apply.

What would the temperature of the surface be if the Earth did not have an atmosphere?

How would the lack of water affect cellular respiration?

Different types of normal tissues in the human body have different mitotic indices. From the following list, which normal tissues would you expect to have the highest mitotic index: muscle, skin, kidney, or lung? Explain your answer.