Prepare for NEET Biology Transport in Plants (How Do Plants Absorb Water) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert help to understand root absorption and mycorrhizal associations.
NEET Questions / Botany / Transport in Plants / How Do Plants Absorb Water
A researcher observes that water absorption by roots is significantly reduced when the plant is treated with a respiratory inhibitor. Which of the following best explains this observation?
Respiratory inhibitors directly block aquaporin function, preventing water movement.
Respiration is essential for maintaining root cell turgidity, which is directly linked to water absorption.
Active transport of ions into the root cells requires energy, creating a water potential gradient that drives water uptake.
Inhibition of respiration disrupts the cohesion-tension theory, preventing water movement through the xylem.
Which of the following scenarios would result in the LEAST efficient water absorption by a plant's roots?
Slightly acidic soil with optimal nutrient availability
Well-aerated soil with moderate water content
Low soil temperature coupled with high humidity
High soil salinity coupled with low soil oxygen levels
The Casparian strip in the endodermis plays a crucial role in water absorption by:
Increasing the surface area for water absorption.
Preventing water loss from the cortex back to the soil.
Actively transporting water into the xylem.
Forcing water to enter the symplast, allowing for selective uptake of minerals.
A plant with a mutation that disables aquaporins in its root cells would likely exhibit:
Complete cessation of water uptake.
Enhanced water uptake due to increased reliance on the apoplast pathway.
Reduced rate of water uptake but not complete cessation.
No change in water uptake as aquaporins are primarily involved in transpiration.
Under conditions of high transpiration pull, the primary driving force for water movement through the xylem is:
Root pressure generated by active transport of ions.
Capillary action within the narrow xylem vessels.
Active transport of water molecules by xylem parenchyma cells.
Cohesion and adhesion of water molecules, creating a continuous water column.
The guttation phenomenon observed in some plants is primarily driven by:
High transpiration rates during the day.
Active transport of water into the xylem by xylem parenchyma.
Root pressure exceeding transpiration pull, particularly at night.
Capillary action in the xylem vessels.
The main driving force for the absorption of water in plants is:
Root pressure
Capillary action
Transpiration pull
Photosynthesis
Water enters the root hair cells by:
Diffusion
Active transport
Osmosis
Facilitated diffusion
Which part of the root is primarily responsible for water absorption?
Root cap
Root hairs
Xylem
Phloem
The apoplast pathway of water movement in roots involves:
Movement through cytoplasm
Movement through plasmodesmata
Movement through cell walls and intercellular spaces
Movement through vacuoles
