When is facilitated diffusion necessary?

a. When the molecules are too large.

b. When the molecules are insoluble.

c. When the direction of movement is opposite to natural diffusion.

d. none of the above

What three particles make up atoms?

List three organisms transported by ocean currents.

How many main structures make up a neuron?

The passive process of filtration promotes movement across a barrier based solely on:

Which life activity is not required for the survival of an individual cell?

Which group of organic compounds can speed up the breakdown of other organic compounds

Uv waves and gamma waves can cause dna mutations that result in various forms of cancers. explain why using the terminology found within the passage. give one example of the damage caused by one of these waves.

You go for a run and breathe heavily for an extended amount of time. How is this affecting your pH levels?

Compared with normal hemoglobin, the hemoglobin of a person with sickle cell disease a. is longer. b. is shorter. c. has a different sequence of amino acids. d. is sickle-shaped. e. has the same sequence of amino acids.

If a white dwarf in a binary star pair is accreting mass and it exceeds the 1.4MSun limit, it will: Turn into a Neutron Star Turn into a Black Hole Turn into a Main Sequence star. Explode