Which ofthe following are characteristic features of cells of Meristematic tissues

(1) Actively dividing cells with dense cytoplasm, thick cell wall and prominent nuclei.
(2) Actively dividing cells with dense cytoplasm, thin cell wall and no vacuoles.
(3) Actively dividing cells with little cytoplasm, thin cell wall and prominent nuclei.
(4) Actively dividing cells with thin cytoplasm, thin cell wall and no vacuoles.

Which of the following muscles are involuntary in action ?

(1) Muscles of limbs
(2) Muscles of heart
(3) Muscles of iris
(4) Both (2) & (3)

Tissue found in area of regular wear and tear is

(1) Simple squamous epithelium. 
(2) Stratified squamous epithelium.
(3) Simple cuboidal epithelium. 
(4) Stratified cuboidal epithelium.

Lenticels are found in ..........

(1) Leaves
(2) Flowers
(3) Roots
(4) Stems

In muscular tissues contractile proteins play a role in
(1) Osmosis and diffusion
(2) Contraction and relaxation
(3) Transpiration and transportation
(4) Excretion and secretion