The important gases, carbon dioxide and oxygen, enter and leave the leaf through the:

The leaf has a shiny, waxy cuticle around it to:

The role of the guard cell is to:

Which structures open and close stomata to allow gas exchange but prevent water loss in leaves?

What part of the plant absorbs oxygen?

During the day, plants take in _______ and give out _____ to make food.

The air spaces may comprise upto ______ of total volume of leaf surface.

The ions that flow back to guard cells, from epidermal cells at the end of the day are:

Most of the chloroplast cells are found in the:

What is the TISSUE that carries food from a plant’s leaves to its cells?

How is the spongy mesophyll adapted for gas exchange?

Why are palisade cells arranged at the top of the leaf?

Transpiration is:

Where is xylem found in the plant?

Aerating openings formed in the bark through which exchange of gases takes place and water is lost in the form of vapours are:

Lenticels look like:

Which of the following is not true of guard cells?

Leaves are efficient at gas exchange because:

An adaption for better gaseous exchange in plant leaves is:

How do xerophytes reduce water loss?

Xerophytes are types of plants that are adapted to living in which types of conditions:

Desert plants have a deeply penetrating root system because:

Identify plant adaptations of Xerophytes:

Which is true in case of Xerophytes:

Plants growing near sea shore will usually have xerophytic characters like thick leaves because: