Plant Cells

Q.

Explain the structure of stomata.

Q.

Give a flow chart for classification of plant tissues. [5 MARKS]

Q.

A student is observing the temporary mount of a leaf peel under a microscope. Draw a labelled diagram of the structure of stomata as seen under the microscope.

Q.

The diagram below represents a diagrammatic section through part of a leaf.

Label the parts indicated by letters A to F.

1. (A) Palisade Mesophyll
   (B) Guard cell
   (C) Chloroplast
   (D) Upper epidermis
   (E) Spongy Mesophyll
   (F) Cuticle

2. (A) Cuticle
   (B) Palisade Mesophyll
   (C) Guard cell
   (D) Chloroplast
   (E) Spongy Mesophyll
   (F) Upper epidermis

3. (A) Cuticle
   (B) Upper epidermis
   (C) Chloroplast
   (D) Guard cell
   (E) Spongy Mesophyll
   (F) Palisade Mesophyll

4. (A)Palisade Mesophyll
   (B) Spongy Mesophyll
   (C) Chloroplast
   (D) Guard cell
   (E) Upper epidermis
   (F) Cuticle

Q.

What is the function of the guard cell? [1 MARK]

Q. What is stomatal aperture?

Q. Complete the following statements by using appropriate words.

Openings found on the under surface of the dorsiventral leaf are

Q.

What is present in the microscopic cell organelles called chloroplasts which helps in the process of photosynthesis?

1. Chlorophyll

2. Mitochondria

3. None of the above

4. Golgi bodies

Q.

What is stomata and its function? [3 MARKS]

Q.

Are stomata same in all plants

Q.

Appu focused a section of leaf under the microscope and observed the following image. Statements below list characteristics of the labeled parts. Based on the statements choose the correct option.

Statement 1-(iii) helps to regulate transpiration.

Statement 2-(ii) allows only entry of water vapour.

Statement 3-(i) is essential for photosynthesis.

Statement 4-(iii) closes completely in the morning.

1. Statements 1 and 2 are correct.

2. Statements 1, 2, 3 and 4 are correct.

3. Statements 1 and 3 are correct.

4. Statements 2, 3 and 4 are correct.