Defense Mechanism in Plants

Q.

Which of the following act as defence mechanisms in plants?

1. Bark

2. Cuticles

3. Cell wall

4. Callose

Q.

The bark of the tree protects the plant cells from germs/ pathogens.

1. True

2. False

Q. _________ prevents the entry of germs which have crossed the cell wall.

1. Cuticle
2. Callose
3. Lignin
4. Suberin

Q. Match the following plant parts to their defence mechanisms.

Q. Match the following.

$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{(1) Bark}& \text{(A) A resistant coat that provides rigidity to plant cells}\\ \text{(2) Cuticles}& \text{(B) A polysaccharide that prevents the entry of germs}\\ \text{(3) Cell wall}& \text{(C) A dead cell that protects inner cells from the germs}\\ \text{(4) Callose}& \text{(D) The external layer of the epidermis of leaves}\end{array}$

Q.

The blood group O contains __ antibodies.

1. Cuticle

2. Cell wall

3. Bark

4. Stem

Q.

Which of the following does not provide rigidity to the cell wall?

1. Lignin

2. Keratin

3. Cutin

4. Suberin

Q. Squamous epithelium are involved in forming a diffusion boundary.
What is a diffusion boundary??

Q. Match the following.

$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{(1) Bark}& \text{(A) A resistant coat that provides rigidity to plant cells}\\ \text{(2) Cuticles}& \text{(B) A polysaccharide that prevents the entry of germs}\\ \text{(3) Cell wall}& \text{(C) A dead cell that protects inner cells from the germs}\\ \text{(4) Callose}& \text{(D) The external layer of the epidermis of leaves}\end{array}$