PLANT PHYSIOLOGY - PLANT WATER RELATION Question Preview (ID: 56460)


GET YOUR KNOWLEDGE ON WATER PROPERTIES AND WATER TRANSPORT IN PLANT INTO TEST WHILE PLAYING THE GAMES. LEARN, PLAY AND ENJOY. TEACHERS: click here for quick copy question ID numbers.

How are sucrose and amino acids transported in a plant?
a) Through the xylem
b) Through the phloem
c) Through the xylem and phloem
d)

Why does water loss slow down if a plant is put into a plastic bag?
a) The humidity increases
b) The temperature increases
c) The light intensity increases
d) The transpiration increases

How are the xylem and phloem arranged in plant roots?
a) In the centre of the root
b) In bundles near the edge of the root
c) Evenly spaced out across the root
d)

Why does the rate of transpiration increase if the light intensity is increased?
a) The humidity increases, which makes the rate of transpiration increase.
b) The stomata open wider to let more carbon dioxide into the leaf for photosynthesis
c) The root hair cells become more permeable to water, letting more water into the plant and through the xylem
d)

The rate of transpiration will _________ if the atmospheric pressure is low.
a) Increase
b) Decrease
c) Stay unchanged
d) Can’t be determined

Root pressure occurs when there is
a) More transpiration and more absorption
b) Less transpiration and more absorption
c) Less transpiration and less absorption
d) More transpiration and less absorption

Plant roots are able to absorb water because of ....?
a) evaporation
b) capillary action
c) surface tension
d) universal solvent

Why can water have no net charge but have slight charges in different parts of the molecule?
a) The oxygen end is slightly negative and the hydrogen end is slightly positive
b) The hydrogen end is slightly negative and the oxygen end is slightly positive
c) The hydrogen and oxygen ends change in polarity
d) Because it is hydrophobic

Which of the following properties of water enables it to move from the roots to the leaves of plants?
a) Water expands as it freezes
b) Water is an excellent solvent
c) Water exhibits cohesive behaviour
d) Water moderates temperature

Water striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?
a) The insects are light enough so they do not break the hydrogen bonds holding the water molecules together
b) The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.
c) The insect’s feet are non-polar, so they are repelled by the polar water molecules and pushed away from the water’s surface
d) The insects are small enough to see the individual water molecules, they are able to step carefully from one molecule to othe

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