Name a component of phloem formed by the end to end fusion of cells with the perforated transverse wall.

Name the type of tissue, which is most abundant in animals.

Give one similarity between permanent and meristematic tissue.

Give one word for

(i) zig-zag thickenings in cardiac muscles.

(ii) Thickening present in sclerenchyme cell.

What is the function of thin, hair-like projections present on the cuboidal epithelium?