Importance of Water in Plants

What is the primary function of xylem tissue in plants?

Transporting water, nutrients, and minerals from the roots to the leaves (correct)
Preventing plants from overheating through evaporation
Ensuring that cells have the right tonicity
Transporting water and nutrients around the plant in both directions

What is the main advantage of simple plants having a high surface area to volume ratio?

They can respond to stimuli more quickly
They can passively transport water, nutrients, and waste (correct)
They can transport water and nutrients more efficiently
They can grow taller than larger plants

What is the primary function of phloem tissue in plants?

Preventing plants from overheating through evaporation
Transporting water, nutrients, and minerals from the roots to the leaves
Ensuring that cells have the right tonicity
Transporting water and nutrients around the plant in both directions (correct)

Why do larger plants need a complex vascular system?

To transport nutrients and water to every cell in the organism (C) Signup and view all the answers

What is the role of vascular bundles in dicot plants?

They are located in the roots and below the skin of the stem (D) Signup and view all the answers

What is the main function of vascular tissues in plants?

To solve the problem of transporting nutrients and water to every cell in large plants (B) Signup and view all the answers

How do vascular plants obtain water and essential nutrients?

By absorbing water and nutrients through the roots (D) Signup and view all the answers

What is the primary function of water in plants?

To participate in metabolic reactions like photosynthesis (B) Signup and view all the answers

Why do plants wilt or droop when dehydrated?

Because they are unable to maintain the right cell tonicity (C) Signup and view all the answers

What is the role of evaporation in plants?

To prevent plants from overheating (C) Signup and view all the answers

What is the primary force responsible for drawing water up the xylem in transpiration?

Air pressure difference between the leaf and roots (A) Signup and view all the answers

What is the term for the movement of nutrients from the leaves to other parts of the plant?

Translocation (B) Signup and view all the answers

What is the effect of high light conditions on transpiration rate?

Stomata open to increase CO2 absorption (A) Signup and view all the answers

What is the role of companion cells in translocation?

They pump glucose into the sieve cells (A) Signup and view all the answers

What is the name of the cells that regulate the opening and closing of stomata?

Guard cells (A) Signup and view all the answers

What is the effect of wind on transpiration rate?

It increases transpiration rate by blowing away the humid layer (B) Signup and view all the answers

What is the term for the reduction in turgor pressure due to water loss?

Wilting (C) Signup and view all the answers

What is the name of the process by which water flows in the xylem?

Capillary action (C) Signup and view all the answers

What is the effect of high humidity on transpiration rate?

It decreases transpiration rate by reducing water loss (A) Signup and view all the answers

What is the primary function of stomata in plants?

To absorb CO2 for photosynthesis (B) Signup and view all the answers

What is the primary function of the root system in plants?

To provide support and stability to the plant through anchorage (D) Signup and view all the answers

What is the main difference between the extracellular and cytoplasmic pathways of water and nutrient absorption?

The extracellular pathway involves passive diffusion, while the cytoplasmic pathway involves active transport (D) Signup and view all the answers

What is the function of the casparian strip in the root system?

To force water and solutes to enter the cells, allowing for selective transport into the xylem (B) Signup and view all the answers

What is the main characteristic of vessel elements and tracheids in the xylem?

They are hollow cells, as they mature and their nucleus and cytoplasm disintegrate (C) Signup and view all the answers

What is the primary function of the phloem in plants?

To transport glucose and nutrients produced by photosynthesis to the rest of the plant (A) Signup and view all the answers

What is the main difference between the structure of xylem and phloem tubes?

Xylem tubes are composed of vessel elements and tracheids, while phloem tubes are composed of sieve cells and companion cells (C) Signup and view all the answers

What is the function of companion cells in the phloem?

To regulate the entry of nutrients into the phloem (B) Signup and view all the answers

What percentage of the water in the xylem is used during photosynthesis?

1% (B) Signup and view all the answers

What is the main purpose of transpiration in plants?

To help plants regulate heat and water balance, and prevent wilting and cell damage (D) Signup and view all the answers

What is the primary function of root hair cells in the root system?

To increase the surface area for absorption of water and nutrients (D) Signup and view all the answers