Statement 1: Water enters into leaves only through the stomata. Statement 2:Water comes out of the leaves through stomata in the form of vapours. Choose the correct option:
Answers
Answer:
Correct option is
B
Both processes can happen together because the diffusion coefficient of water and CO2 is different.
When a plant is transpiring, its stomata are open, allowing gas exchange between the atmosphere and the leaf. Open stomata allow water vapor to leave the leaf but also allow carbon dioxide (CO2) to enter. Carbon dioxide is needed for photosynthesis to operate. Much more water leaves the leaf than CO2 enters for three reasons:
1. H2O molecules are smaller than CO2 molecules and so they move to their destination faster.
2. CO2 is only about 0.036% of the atmosphere so the gradient for its entry into the plant is much smaller than the gradient for H2O moving from a hydrated leaf into a dry atmosphere.
3. CO2 has a much longer distance to travel to reach its destination in the chloroplast from the atmosphere compared to H2O which only has to move from the leaf cell surface to the atmosphere.
Explanation:
make me brainlist
please give me some thanks