Pressure potential is positive at the time of
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
NEET Practice Questions (MCQs) with Answers & Solutions
Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
When a plant is flooded it often increases its production of
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
Explanation
When a plant is flooded it often increases its ethylene. Ethylene shuts down leaf growth very fast after the plant senses limited water availability
Lowest solute potentials are found in the cells of
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
The plant hormone, _______________ , plays a role in closing of stomata.
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
Maintaining turgor pressure in guard cells requires an uptake of
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
Explanation
The opening of gas exchange pores requires the uptake of potassium ions into guard cells.
About _______________ % of the water taken in by roots is lost by transpiration.
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
Explanation
Plants lose gallons of water every day through the process of transpiration, the evaporation of water from plants primarily through pores in their leaves. Up to 98% of the water absorbed by roots is lost via transpiration through plant leaves.
Essential ions except _______________ are
removed from the roots and relocated through the xylem.
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
Explanation
Calcium, an essential nuuient, cannot be relocated elsewhere once it has been transported .
Guttation is:
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
Explanation
At night in some plants, root pressure causes guttation or exudation of drops of xylem sap from the tips or edges of leaves. Water then diffuses from the soil into the root xylem due to osmosis. Root pressure is caused by this accumulation of water in the xylem pushing on the rigid cells.
Stomata close when the guard cells:
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
Explanation
Stomata close when the guard cells lose water and become flaccid. This occurs because potassium ions move back out of the guard cell, followed by water that lowers the pressure in the guard cell.
Which is an incorrect statement.
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
Explanation
Translocation of Mineral Ions: Minerals ions reach xylem through active or passive uptake, or a combination of both. Their further movement through the xylem is alongwith the transpiration stream. The growing regions of the plant are the main sinks for mineral elements.
Ready to ace NEET?
Free access · No credit card required
Frequently Asked Questions
Yes. You can attempt every NEET question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.