Plants and stuff

Question 1

Guard cells open and close stoma in different conditions. When light intensity is high, potassium ions move into guard cells. Describe how this movement of potassium ions causes the stoma to open.

Answer 1

When the potassium ions move into the guard cells they increase the concentration. This causes water to move into the guard cells from more dilute areas by osmosis. The additional water leads to the guard cells swelling unevenly because the thicker, inner walls are less flexible than the thinner, outer walls. The stoma opens due to this uneven swelling.

Question 2

Magnesium ions are used to make…

Answer 2

Chlorophyll

Question 3

Nitrates make…for..

Answer 3

Proteins for growth

Question 4

Describe how water moves from roots to the leaves.

Answer 4

Via the xylem
This is called transpiration

Question 5

What does a lack of magnesium ions cause…

Answer 5

Chlorosis

Question 6

What does a lack of nitrates do…

Answer 6

Stunted growth