Quiz & Worksheet - How Plants Transport Solutes & Water | Study.com - Free Printable

Problem Analysis:

The provided image contains a quiz worksheet titled "Quiz & Worksheet - How Plants Transport Solutes & Water." It consists of three multiple-choice questions related to plant physiology, specifically focusing on the transport of water and solutes in plants. Below is a detailed explanation of each question and its solution.

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Question 1: What do we call the solution of water and solutes that travels through the transport tissues of a plant?

#### Options:
- The solute
- The sap
- The xylem
- The plant juice

#### Explanation:
- Solute: This refers to the dissolved substances in a solution. While solutes are present in the transport system, "solute" alone does not describe the entire solution.
- Sap: Sap is the general term used for the fluid that flows through the vascular tissues of plants. It contains water, minerals, sugars, and other nutrients.
- Xylem: Xylem is the tissue responsible for transporting water and minerals from the roots to the rest of the plant. However, it is a tissue, not the fluid itself.
- Plant juice: This is an informal term and not the correct scientific name for the fluid transported in plants.

#### Correct Answer:
- The sap

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Question 2: Which plant tissue is responsible for transporting water up from the roots?

#### Options:
- The xylem
- The phloem
- The chloroplast
- The sieve-tube elements

#### Explanation:
- Xylem: This is the primary tissue responsible for transporting water and dissolved minerals (solutes) from the roots to the leaves and other parts of the plant. It consists of dead cells (tracheids and vessel elements) that form a continuous pathway for water movement.
- Phloem: This tissue is responsible for transporting organic nutrients (such as sugars) produced during photosynthesis from the leaves to other parts of the plant. It is not involved in water transport.
- Chloroplast: These are organelles found in plant cells, primarily in leaf cells, where photosynthesis occurs. They are not involved in transporting water.
- Sieve-tube elements: These are part of the phloem and are responsible for transporting sugars and other organic compounds. They are not involved in water transport.

#### Correct Answer:
- The xylem

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Question 3: What two forces are the driving factors behind xylem transportation?

#### Options:
- Solutes and sap
- Hydrostatic pressure and temperature
- Photosynthesis and mitosis
- Tension and cohesion

#### Explanation:
- Solutes and sap: While solutes are present in the sap, these terms do not describe the forces driving water transport.
- Hydrostatic pressure and temperature: Hydrostatic pressure can play a role in some cases, but it is not the primary force driving water transport in xylem. Temperature affects plant processes but is not directly responsible for xylem transport.
- Photosynthesis and mitosis: Photosynthesis produces sugars, and mitosis is cell division, neither of which are directly involved in driving water transport in xylem.
- Tension and cohesion:
- Cohesion: Water molecules stick together due to hydrogen bonding, forming a continuous column within the xylem.
- Tension: As water evaporates from the leaves (transpiration), it creates a negative pressure (tension) that pulls water upward through the xylem. This process is known as the cohesion-tension theory.

#### Correct Answer:
- Tension and cohesion

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Final Answers:

1. The sap
2. The xylem
3. Tension and cohesion

Boxed Final Answer:

\[
\boxed{\text{The sap, The xylem, Tension and cohesion}}
\]