Tag: transport in plants

Quizzes (25) Questions (112)

Questions Related to transport in plants

Multiple choice need of water transport in plants biology

Water absorption through roots can be increased by keeping the plants

  1. In the shade

  2. In dim light

  3. Under the fan

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Water absorption can be increased by increasing Transpiration which can be increased by

1. Increasing the intensity of light
2. Increasing the wind speed.
Hence if kept under the fan, the water absorption increases.
So the correct answer is 'Under the fan'.

Multiple choice need of water transport in plants biology

The root-hairs are suited for absorbing water from the soil because

  1. Root-hairs have a large surface area

  2. Roots have a semi-permeable membrane

  3. Roots contain a solution of higher concentration than the surrounding water.

  4. All the three
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Root hairs are adapted for water absorption through a large surface area, the presence of a semi-permeable membrane, and a high internal solute concentration that creates an osmotic gradient.

Multiple choice need of water transport in plants biology

Choose the correct answers from the alternatives given.
Field capacity is

  1. The same as permanent wilting point

  2. The amount of water in soil after drainage takes place

  3. Higher for sandy soils than clay soils

  4. The amount of water in soil available to plants
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Field capacity is the amount of soil moisture or water content held in the soil after excess of water has been drained out. Wilting point or permanent wilting point is the minimal amount of soil moisture that is required by the plant not to wilt. This is not the same as field capacity because sometimes drainage of water occurs more than required that causes wilting and even death of the plant.

Hence, the correct answer is 'The amount of water in the soil after drainage takes place'.

Multiple choice need of water transport in plants biology

State whether the following statements are true or false.
A membrane which allows certain substances to pass through it, but not others is called a selectively permeable membrane.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A membrane that allows certain substances to pass through it either by diffusion, passive transport or active transport, it is called selectively permeable membrane. For example, water moves passively through small pores of this membrane.

So, the correct option is 'True'.

Multiple choice need of water transport in plants biology


The mineral ions absorbed by roots reach the leaves through sieve elements

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sieve elements are used to transport organic compounds made during photosynthesis in plants. Sieve elements are the major conducting cells in the phloem. But sieve elements don't transfer the mineral ions absorbed by roots to the leaves

So the given statement is false

Multiple choice water potential water potential and pressure plant water relation transport in plants biology

The water potential is?

  1. Equal in soil and atmosphere

  2. Lowest in soil and highest in atmosphere

  3. Highest in soil and lowest in atmosphere

  4. Non-existent at both the places
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Water potential is highest in pure water or wet soil (around 0 MPa or slightly negative) and decreases along the soil-plant-atmosphere continuum, reaching its lowest values in dry atmospheric air to drive transpiration.

Multiple choice water potential water potential and pressure plant water relation transport in plants biology

If the solute is added in the given solution than what observation can be made?

  1. Its DPD decreases

  2. It's water potential decreases

  3. DPD & water potential remains unchanged

  4. Its water potential increases
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Adding solute to a solution increases the solute concentration, which lowers its solute potential (makes it more negative) and consequently decreases the overall water potential of the solution.