Tag: transport in the phloem of plants

Questions Related to transport in the phloem of plants

Transparent hairs on catkins and caterpillars function to ____________.

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. Trap heat

  2. Trap moisture

  3. Reflect light

  4. Drink water

Show answer
Correct Option: B

Contact exchange of ions occurs.

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. Between root and soil particles

  2. Root and coil solution

  3. Cell and external solution

  4. All the above

Show answer
Correct Option: A

A characteristic based on concentration of particles in solution is

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. Colligative property

  2. Surface tension

  3. Colloidal nature

  4. All the above

Show answer
Correct Option: A
Explanation:

Colligative property of a solution is based on the concentration of solute particles but not on its identity. It includes vapor pressure lowering, boiling point elevation, freezing point depression and osmotic pressure. Non-colligative property of a solution is based on the identity of the dissolved particles and the solvent. It includes viscosity, surface tension and solubility.

Thus, the correct answer is option A.

Contact exchange theory was put forward by :

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. Jenny and Overstreet

  2. Hylmo and Kramer

  3. Bennet and Clark

  4. De Vries and Curtis

Show answer
Correct Option: A

Most hebaxeous plants have how much dry weight of its total fresh weight?

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. 92%

  2. 10-15%

  3. 50%

  4. 29%

Show answer
Correct Option: A

On which surface of cell, Donnan equilibrium occurs

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. Cell wall

  2. Plasma membrane

  3. Transport

  4. Nuclear membrane

Show answer
Correct Option: B
Explanation:
Donnan equilibrium is the equilibrium reached between two ionic solutions separated by a semipermeable membrane when one or more of the kinds of ion cannot pass through the membrane. The result is a difference in osmotic pressure and electrical potential between the solution.
So the correct answer is 'Plasma membrane'.

Which of the following is a food synthesising tissue?

biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

  1. Phloem

  2. Sclerenchyma

  3. Chlorenchyma

  4. Aerenchyma

Show answer
Correct Option: A
Explanation:

  • Phloem is also called as bast. 
  • These tissues in plants conduct foods made in the leaves to all other parts of the plant. 
  • Phloem is composed of various specialized cells called sieve tubes, companion cells, phloem fibers, and phloem parenchyma cells.
  • Hence, Phloem is a food synthesizing tissue.

So, the correct answer is 'Phloem'.

The movement of molecules in phloem is

biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

  1. Unidirectional.

  2. Bidirectional.

  3. Non-directional.

  4. Sometimes unidirectional and sometimes bidirectional.

Show answer
Correct Option: B
Explanation:

Phloem is responsible for transport of food and minerals. Food synthesized in photosynthetic parts is translocated to nonphotosynthetic parts through the phloem. Phloem translocates organic substances and inorganic solutes first from leaves to all other parts of the plant and storage organs. Storage organs re-export organic nutrients to those parts which require the same as newly formed leaves and fruits i.e., it is bidirectional.

Thus, the correct answer is option B.

In plants, water is transported through

biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

  1. Xylem

  2. Phloem

  3. Stomata

  4. Root hair

Show answer
Correct Option: A
Explanation:
  • Xylem functions as a conducting tissue for water and minerals from roots to the stem and leaves.
  • It also provides mechanical strength to the plant parts. It is composed of four different kinds of elements, namely, tracheids, vessels, xylem fibres, and xylem parenchyma.
  • Hence In plants, water is transported through Xylem.
  • So, the correct answer is 'Xylem'.

The number of division with the plants having vascular

biology transport in plant transport in the phloem of plants vascular tissue permanent tissue

  1. $4$

  2. $2$

  3. $1$

  4. $3$

Show answer
Correct Option: A