Root and Root modifications- Practice Test 1

Answer: Option A

Explanation

Orobanche is a complete root parasite on Tobacco (Nicotiana). It is also called as broom rape.

Answer: Option A

Explanation

Roots are absent in Wolffia. Similarly, other plants like Ceratophyllum and Utricularia are completely without roots. In these plants the leaves are modified into root like structures. Here true roots are absent.

Answer: Option D

Explanation

Plants differs from animals by having Autophic nature, Cellulosic cell wall and being fixed to the substratum. Plants are autotrophic as they prepare their own food. Plant cell wall is composed of cellulose. Plants are fixed to a substratum throughout their life. Hence option D is correct

Answer: Option D

Explanation

The Lateral roots developed in obliquely in acropetal (endogenously) succession.

Answer: Option D

Explanation

The following zones of Arrange roots from apex to base

A) Root apex

B) Growth & Elongation

C) piliferous

D) Maturation Zone

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

Hence option 4 is correct.