Gas Exchange

Question 1

How does stomata open

Answer 1

Caused by ions moving into the guard cells which causes water to move in by osmosis because water potential has decrease. Therfore guard cell is turgid causing the guard cells to swell and the stomata to open

Question 2

Hydrostatic pressure

Answer 2

The residual pressure from he heartbeat that is still present as the blood enters the external end of the cappilary beds and tends to force fluid out through the cappilary walls

Question 3

Oncoming pressure

Answer 3

Tendency for water to move into the cappilaries by osmosis

Question 4

How is fluid squeezed out of the cappilaries

Answer 4

When hydrostatic pressure is greater than oncoming pressure fluid leaves cappilaries and tissue fluid forms

Question 5

Factors affecting transpiration

Answer 5

Light
Temperature
Wind speed
Air humidity

Question 6

Loght

Answer 6

As light intensity increases the amount of stomata opening increases and the rate of transpiration increases

Question 7

How is new species fomed

Answer 7

When a organism is rpeorductively isolated this leads to the formation of new species due to the build of genetic information and due to different selective pressures and enviornments