transport in plants

Question 1

transportation of water vs sugar in plants

Answer 1

water:
- transported in the xylem
- one way flow from roots to leaves

sugar:
- transported in the phoelm
- two-way flow, sugars normally flow from leaves (where they are produced by photosynthesis) to the rest if the plant where they are needed
- early spring - flows into storage (normally roots or stems) to buds

Question 2

two factors that affect water movement in plants

Answer 2

root pressure, transpiration

Question 3

factor that affect water movement in plants - root pressure

Answer 3

draws water in due to the presence of minerals in the roots via osmosis “push from below”

Question 4

factor that affect water movement in plants - transpiration

Answer 4

evaporation of water from the stomach of leaves pulls water through the xylem due to its cohesive and adhesive properties “pull from above”

Question 5

How would the rate of transpiration in plants be affected in a dry environment versus a humid environment?

Answer 5

Transpiration in dry vs. humid environment would change because the drier the environment, the more evaporation of water that will take place. This is because the atmosphere can only hold a certain amount of water before it is over saturated.

Question 6

How does the direction of flow in the phloem of deciduous trees compare between spring versus fall/summer?

Answer 6

Direction of the flow of sugars in the phloem of deciduous trees:
Early Spring - Leaves lost from winter need to grow back (requires energy), therefore sugars flow from where they are stored (ex. branches, roots, stems) upwards to the buds

Fall/Winter - Sugars made during the spring need to be stored, so it flows downwards from leaves to storage (branches, stems, roots)

Question 7

3 types of sugars that are found within plants

Answer 7

glucose, sucrose, starch