Read the below statements about transpiration: 1. Transpiration is highest in dry and windy conditions. Which of the above statements are correct?
2. It helps in the ascent of sap through cohesion-tension.
3. Transpiration always results in wilting.
Only 1 and 2 are correct
Statement 1 is correct — Transpiration is highest in dry, hot, windy, and low-humidity conditions because these increase the vapour pressure gradient between the leaf interior and the atmosphere.
Statement 2 is correct — Transpiration creates a tension (negative pressure) in the xylem that pulls water upward through cohesion-tension mechanism, facilitating the ascent of sap.
Statement 3 is incorrect — Transpiration does not always result in wilting. Wilting occurs only when water loss exceeds water absorption. Under normal conditions, the plant's water uptake matches transpiration losses.
Similar Questions
Identify the animal that does NOT have bilateral symmetry.
Which of the following statements is FALSE?
What happens to the guard cells when water flows into them?
Colloidal systems – such as gum, starch, proteins, cellulose, agar, and gelatine – when placed in water, will absorb a large volume of water and swell up. These substances are called _________.
_______ is a branch of biology that studies fungi.
Which of the following is a natural flame retardant?
Which component performs the task of capturing oxygen in the blood?
Select the correct option about Kwashiorkor.
Statement A: It is a form of malnutrition caused by a lack of fat in the diet.
Statement B: Children who develop Kwashiorkor may not grow or develop properly and may remain stunted for the rest of their lives.
Match the columns.
Column-A
(Enzyme/Protein)
Column-B
(Role in DNA replication)
i.
Helicase
a.
Joins the 3' end of the new DNA fragment to the 5' end of the previous one
ii.
RNA primase
b.
Nucleotide polymerisation
iii.
DNA polymerase
c.
RNA primer synthesis
iv.
DNA ligase
d.
Opens up the DNA double helix
Which cells, also called neurilemma cells, are the main glial cells in the PNS and play an essential role in the survival and functions of neurons?
Important Questions from Biology
Which of the following statements about living and non-living being is/are correct?
1. While living being can demonstrate growth and repair, non-living being cannot.
2. While living being demonstrates metabolic processes, non-living being does not.
Select the correct answer using the code given below.Movement of materials to different parts of cytoplasm and nucleus is generally carried out by
Which one of the following cell organelles may play a role in expelling excess water and wastes in case of unicellular organisms?
Transformation of meristematic cells into specific permanent tissues occurs by the process of
If human blood is placed in a 2% detergent solution, what will happen to the RBC?
