The structure found in all cells that acts like a barrier of the cell controlling what enters and leaves the cell

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one

What is the next step in muscle contraction after the actin changes shape