Root and Root modifications- Practice Test 5

Answer: Option A

Explanation

The velamen roots contain a special, multilayered, dead hygroscopic epidermal tissue called velamen tissue or simply velamen. This tissue absorbs moisture from the atmosphere just like blotting paper.

Answer: Option C

Explanation

Tuberous roots are roots which store food material. Due to the accumulation of the stored food, the roots get swollen to become fleshy and tuberous. Hence these roots are also called as tuberous roots. Among the given options tuberous roots found in Ipomoea batatas (sweet potato).

Answer: Option D

Explanation

The Lateral roots developed in Acropetal (endogenously) succession and Obliquely, The lateral roots are formed endogenously (Endogenous in the sense from a deeper layer) in an acropetal succession from pericycle (seat of its origin are the cells of pericycle.)

Answer: Option D

Explanation

The following are the zones of root arranged from apex to base

A) Root apex

B) Growth & Elongation

C) piliferous

D) Maturation Zone

Hence option 4 is correct

(Root apex: The tip of the root is covered by a thimble-like special structure called the root cap. It protects the tender apex of the root from injury as it makes its way through the soil. Growth & Elongation :Secondary growth occurs in this region and The cells of the elongation zone gradually differentiate and mature. Hence,the region just above thee longation region is called the region of maturation Piliferous Root :The region where the hair grows is also called as piliferous zone. Maturation: The cells of the elongation zone gradually differentiate and mature. Hence, the region just above the elongation region is called the region of maturation. The region of maturation helps the plant in fixation and conduction of water and minerals)

Answer: Option A

Explanation

Root cap develops from a meristem called calyptrogen. Root cap is also called as Calyptra.