Plant Structure：練習題

Which structure in the leaf is primary responsible for regulating gaseous exchange and the loss of water vapour?

A transverse section of a dicotyledonous leaf is viewed under a light microscope. Which feature allows the leaf to transport water from the roots to the mesophyll cells?

Which part of a dicotyledonous stem is responsible for the transport of sucrose and amino acids?

Which adaptation of a root hair cell allows it to absorb water and ions efficiently from the soil?

In a dicotyledonous leaf, which tissue layer contains the highest density of chloroplasts to maximize the rate of photosynthesis?

In a transverse section of a dicotyledonous leaf, state the primary function of the stomata and the vascular bundles.

Identify the cell layer in a leaf that contains the highest distribution of chloroplasts and explain the significance of this arrangement for photosynthesis.

A student observes a transverse section of a dicotyledonous leaf under a microscope.
(a) Describe the distribution of chloroplasts within the mesophyll cells and explain how this distribution relates to the efficiency of photosynthesis.
(b) Identify the tissue responsible for the transport of manufactured food and state its exact position within the vascular bundle of a leaf.