FREE NEET Biology Practice MCQ Test: Transport In Plants Exercise 2 Questions Answers With Detailed Explanations [PDF]

Opening and closing of stomata is due to the

When stomata open, the pH of guard cells

Root pressure develops due to

Effect of root pressure is visible

Xylem translocates

If two solutions have the same osmolarity. They are said to be

The best example of imbibition is

Properties of water which provide high tensile strength (i.e., ability to resist a pulling force) are:

The accepted mechanism for the translocation of sugar from source to sink is called

Where is the control point for minerals, where a plant adjusts the quantity and types of solutes that reach the xylem?

Sink and source in sucrose transport may be reversed depending on

Assertion:
Water potential is new term for diffusion pressure deficit.
Reason:
Both diffusion pressure deficit and water potential have a positive value.

For covering a small distance, the substances move by

Process occurs in leaves, which may lower their temperature is :

Which one gives the most valid and recent explanation for stomatal movement?

Translocation of carbohydrate nutrients usually occurs in the form of

A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it was phloem sap?

Water logging of soil makes it physiologically dry because:

Select the incorrect statement from the following:

1. A watermelon has over 92 per cent water.
2. Most herbaceous plants have only about 10–15% of its fresh water as dry matter.
3. Woody parts of the plant have very little water.
4. Seed is without water.
5. Mature corn plant absorbs almost three litres of water per day.
6. Mustered plant absorbs water epical to its own weight in about 5 hours.

A cell swells up when kept in