Bot lec - Roots

Which of the following is NOT TRUE about the Casparian strips?

• It acts as an apoplastic barrier

• It functions to eliminate harmful minerals

• It acts as symplastic barrier

• It is made up of suberin

• It avoids backflow of water and nutrients

•In dicot roots, the pericycle gives rise to the following:

1.Lateral roots

2.Procambium

3.Vascular cambium

• 1 only

• 1 and 3 only

• 1,2,3

• 2 and 3 only

Which of the following is responsible for the gravity perception of a root?

• Amyloplast

• Mucilage

• Quiescent center

• primordia

Which of the following gives rise to the epidermis?

• Ground meristem

• Procambium

• Protoderm

• Vascular cambium

Is pith present in monocot root?

• yes

• no

Tiny vacuoles merge and cells become longer and wider. This happens in what region?

• Root cap

• Region of cell division

• Root hair zone

• Region of elongation

Which of the following statements is NOT TRUE about the pericycle and the lateral roots?

• Root hair arise from the pericycle while lateral roots are the outgrowth of the epidermis

• Lateral root arise from the pericycle while root hairs are the outgrowth of the epidermis

• Root hair has not cuticle while lateral root has it

• Root hair and lateral root both increase the absorption of water

• They both have the cuticle

In osmosis water will move from ____ diluted solution to ____ diluted solution to reach the equilibrium

• less, more

• More, less

Source cells: _______ while sink cells: _____

• Unload carbohydrates, load carbohydrates

• Load carbohydrates, unload carbohydrates

• Consume, produce

• Both load carbohydrates

This type of root tolerates drought by helping plants use moisture held in deeper soil layers.

• Taproot

• Fibrous root

• Adventitious root