Substance X is more concentrated outside the cell than inside the cell. Substance Z is more concentrated inside the cell than outside the cell. Assume that both substances can pass freely through the cell membrane. Over time, what will happen?

Why are gradients important to diffusion and osmosis

A population of small in a lake

Explain what a concentration gradient is and how it is used in cellular respiration.

Determine whether each phrase mainly describes surface ocean currents or deep ocean currents. - influenced by rotation of Earth - caused by differences in water -found closer to the ocean floor -caused by differences in water density - found near

People with the genetic disorder Xeroderma pigmentosum a. have no direct DNA repair mechanisms. b. cannot repair UV induced DNA damage c. do not express mismatch repair proteins. d. fail to activate DNA strand break repair e.

Name the two energy-equivalent molecules that contain three phosphates as part of their structure. what makes these two molecules different? how many high energy phosphate bonds do they contain? nutrition

During what period of time has the sunbelt region of the u. s. grown most quickly?

The axial skeleton includes the A) vertebra, skull, and ribs B) hip bones, knees, and feet C) shoulder bones, elbows, and hands D) bones of the fingers and toes

After transcription, nuclear RNA is capped, polyadenylated, spliced. After successful splicing, proteins are added to the mature mRNA at the exon junction complex and then transported to the cytoplasm.

How would you distinguish adaptations and variations for a younger student?