Root and Root modifications- Practice Test 1

Answer: Option D

Explanation

Reserved food in Dahila root is inulin

Answer: Option A

Explanation

Single adventitious root develops into tuberous root in Ipomea batatus (sweet potato). These roots store food material, become swollen and attain tuber like shape.

Answer: Option A

Explanation

Epiphytes mostly belong to family Orchidaceae. Vanda is the most common example of the epyphytic plants of the orchidaceae family. Epiphytic orchids have thick, flattened, photosynthetic roots and without any formal organisation of leaves. Their roots are green, aerial and adventitious which help in photosynthesis.

Answer: Option B

Explanation

Each generation of mitosis produces 2 cells; therefore, each consecutive rounds would produce twice as many cells as they started with:

Generation 1 = 2 cells

Generation 2 = 4 cells

Generation 3 = 8 cells

Generation 4 = 16 cells

Generation 5 = 32 cells

Generation 6 = 64 cells

Generation 7 = 128 cells

Answer: Option C

Explanation

When a seed germinates, the radicle of the embryo comes out. The radicle of the embryo develops into first root or primary root. The primary root gives rise to other roots called secondary roots or lateral roots. Finally lateral roots give rise to tertiary roots. When the primary root alone continues to grow, the type of root system formed is known as tap root system. Here, the primary root develops from the radicle of the embryo and remains as the main root throughout the life of the plant and grows straight downwards in the soil. The best example of this type are dicot plants.