Question

Select the correct statement from the following

• A. Absorption of water by seeds and dry wood are examples of facilitated diffusion.
• B. The apoplast is the system of interconnected protoplasts.
• C. Pinus seeds can not germinate and establish without the presence of mycorrhizae.
• D. The translocation in phleom is unidirectional, whereas in the xylem it is bidirectional.

Answer 1

The correct option is C Pinus seeds can not germinate and establish without the presence of mycorrhizae.

Many plants augment their water absorption through mycorrhiza. Mycorrhiza is symbiotic association of a fungus and young roots of plants. Fungal hyphae extend into the soil for good distance. They absorb both water and minerals. The same are passed on to roots. The roots in turn provide food to the fungus. Mycorrhizal association is obligatory for establishment of seedlings of Pinus. Mycorrhizal fungus helps especially in absorption of phosphorous mineral.