Botany - Transport in Plants Question with Solution | TestHub
How many of the following statements are not correct?
[I] In a flowering plant the substances that would need to be transported are water, mineral nutrients, organic nutrients and plant growth regulators.
[II] Over small distances, substances move by diffusion and by cytoplasmic streaming supplemented only by passive transport.
[III] Organic and mineral nutrients undergo multidirectional transport through the xylem.
[IV] From the storage organs, organic compounds are later re-exported.
[V] Phytohormones and other chemical signals are transported to maintain and regulate the plant functions.
Options:
Answer:
Solution:
Statement II and III are wrong. The flow of substances in the xylem is unidirectional and cytoplasmic streaming is caused by a regular change in the structure of cytoskeleton which is an energy-consuming process. Cytoplasmic streaming, also called protoplasmic streaming and cyclosis, is where there is flow inside the cytoplasm. It is typically observed in large plant and animal cells.
