How could you distinguish between a root hair versus a very small root?
A. Root hairs are white, while roots are brown.
B. Root hairs are extensions of single cells, while roots are multicellular.
C. Root hairs only absorb water, not nutrients like roots.
D. Root hairs do not have a cuticle.
E. The epidermis of a root hair is thinner than the epidermis of a root.
B. Root hairs are extensions of single cells, while roots are multicellular.
Root hairs are simply extensions of individual root epidermal cells. So root hairs are much smaller than roots. Since root hairs are small and can access tiny areas within the soil, root hairs function to keep the plant in intimate contact with the soil. The majority of water and nutrient absorption takes place via the root hairs. Root hairs are confined to the zone of maturation on a root.
You might also like to view...
What is the total yield (not net) of ATP from glycolysis?
a. 2 ATP b. 3 ATP c. 4 ATP d. 8 ATP
What is the definition of "swidden"?
A) tundra B) slash-and-burn agriculture C) the boreal forest D) biome
You want to obtain the strongest phototropic response from a shoot. Which wavelength of light should you use?
a. less than 500 nm b. 660 nm c. 730 nm d. 800 nm e. more than 800 nm
Which one of the following marine ecosystems would be expected to have the lowest species diversity and primary production per unit area?
A. Oligotrophic oceans B. Intertidal zone C. Upwelling regions of ocean D. Coral reefs E. Estuaries