Plant Transport System

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Questions and Answers

What is the primary reason for the development of a transport system in plants?

To facilitate the movement of plants from one place to another
To overcome the limitations of diffusion over long distances (correct)
To compensate for the low energy needs of plants
To increase the rate of photosynthesis in plants

What is the main function of the xylem in plant transport systems?

To regulate the temperature of the plant body
To transport products of photosynthesis from leaves to other parts of the plant
To facilitate the exchange of gases between plants and the environment
To transport water and minerals obtained from the soil (correct)

What is the driving force behind the movement of water into the root from the soil?

The difference in light intensity between the root and the soil
The difference in pressure between the root and the soil
The difference in temperature between the root and the soil
The difference in concentration of ions between the root and the soil (correct)

What is the main difference between the phloem and xylem in plant transport systems?

The type of materials transported, with phloem transporting organic compounds and xylem transporting inorganic compounds (B) Signup and view all the answers

What is the primary function of the roots in plant nutrition?

To absorb water and minerals from the soil (C) Signup and view all the answers

What is the significance of the interconnected system of water-conducting channels in the xylem?

It enables the transport of water and minerals to all parts of the plant (A) Signup and view all the answers

What is a characteristic of plant transport systems that is adapted to their low energy needs?

Relatively slow transport systems (A) Signup and view all the answers

What is the significance of the phloem in plant transport systems?

It transports products of photosynthesis from the leaves to other parts of the plant (C) Signup and view all the answers

What is the function of platelets in the blood?

To help in clotting the blood at points of injury (A) Signup and view all the answers

What is the main component of lymph?

Water and a small amount of plasma and proteins (B) Signup and view all the answers

What is the primary function of the lymphatic system?

To drain excess fluid from the extracellular space back into the blood (B) Signup and view all the answers

Where do plants obtain their raw materials from?

Soil (B) Signup and view all the answers

What is the process by which plants take in simple compounds like CO2?

Photosynthesis (D) Signup and view all the answers

What is the role of lymph vessels in the lymphatic system?

To drain excess fluid from the extracellular space back into the blood (A) Signup and view all the answers

What is the main function of the phloem in plants?

To transport soluble products of photosynthesis to storage organs (C) Signup and view all the answers

What is the function of capillaries in the circulatory system?

To exchange nutrients and oxygen with the cells (B) Signup and view all the answers

What is the process of transporting soluble products of photosynthesis in plants?

Translocation (A) Signup and view all the answers

In which direction does the translocation of food and other substances take place in the phloem?

In both upward and downward directions (B) Signup and view all the answers

What is the result of leakage in the circulatory system?

Reduced blood pressure (D) Signup and view all the answers

What is the energy source used to transfer material into phloem tissue?

ATP (D) Signup and view all the answers

What is the result of increased osmotic pressure in phloem tissue?

Water moves into the tissue (D) Signup and view all the answers

What is the role of companion cells in phloem transport?

To help in translocation along with sieve tubes (D) Signup and view all the answers

Where are the products of photosynthesis typically transported to in plants?

To storage organs of roots, fruits, and seeds, and to growing organs (A) Signup and view all the answers

What is the purpose of translocation in plants?

To move materials according to the plant's needs (B) Signup and view all the answers

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Study Notes

Plant Transportation System

Plants transport energy and raw materials through roots and chlorophyll-containing organs.
The distance between soil-contacting organs and chlorophyll-containing organs can affect diffusion processes.
A proper transportation system is essential in plants, especially for tall trees.

Xylem and Phloem

Xylem transports water and minerals from the soil to the plant.
Phloem transports products of photosynthesis from leaves to other parts of the plant.
Phloem also transports amino acids and other substances to storage organs, fruits, and seeds.

Transport of Water in Xylem

Vessels and tracheids in roots, stems, and leaves form a continuous system of water-conducting channels.
Cells in contact with the soil actively take up ions, creating a difference in concentration between the root and soil.
Water moves into the root to eliminate this difference.

Transport of Food in Phloem

Phloem transports soluble products of photosynthesis through sieve tubes with the help of adjacent companion cells.
Energy from ATP is used to increase osmotic pressure, causing water to move into the tissue.
This pressure moves the material in the phloem to tissues with less pressure.

Comparison with Human Transportation System

In humans, capillaries join together to form veins that convey blood away from organs or tissues.
Platelets help to clot blood and minimize loss of blood in case of injury.
Lymph, a colorless fluid, carries digested and absorbed fat from the intestine and drains excess fluid from extracellular spaces back into the blood.

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