Transport system in plants worksheet - Free Printable

Problem Analysis:

The worksheet focuses on the transport system in plants, specifically addressing the roles of xylem and phloem in celery stems and an experiment involving a ring bark removal to study food transport.

---

Section 1: Celery Stem Cross-Section

#### (i) Label X and Y in the diagram above.
- X: The labeled part "X" represents the xylem. Xylem is responsible for transporting water and dissolved minerals from the roots to the leaves.
- Y: The labeled part "Y" represents the phloem. Phloem is responsible for transporting organic nutrients (such as sugars) produced during photosynthesis to other parts of the plant.

So, the labels are:
- X: Xylem
- Y: Phloem

#### (ii) The function of Y is to transport _______ produced by plants during _______ to other parts of the plant.
- Y is the phloem. The function of phloem is to transport organic nutrients (sugars) produced by plants during photosynthesis to other parts of the plant.

So, the completed sentence is:
- The function of Y is to transport organic nutrients (sugars) produced by plants during photosynthesis to other parts of the plant.

#### (iii) Water moves in the stem through the _______ tubes from the roots to the _______ to carry out _______.
- Water moves in the stem through the xylem tubes from the roots to the leaves to carry out photosynthesis.

So, the completed sentence is:
- Water moves in the stem through the xylem tubes from the roots to the leaves to carry out photosynthesis.

---

Section 2: Experiment with Ring Bark Removal

#### (i) What observation can be made in the experiment?
- In the experiment, a ring of bark is removed from the stem. This cuts off the phloem tissue, which is responsible for transporting organic nutrients downward. As a result, the part of the stem above the ring will accumulate sugars because they cannot move downward. Over time, this accumulation causes the area above the ring to become swollen or bulging.

So, the observation is:
- The part above the ring becomes swollen/bulging.

#### (ii) Explain your observation.
- Food transported by the phloem accumulates here.
- But there are no phloem tissues to transport the food down.

So, the explanation is:
- Food transported by the phloem accumulates here.
- But there are no phloem tissues to transport the food down.

#### (iii) What will happen to the plant after a long period of time?
- After a long period of time, the plant will die because the roots will not receive the necessary organic nutrients (sugars) that are typically transported downward by the phloem. Without these nutrients, the roots will starve and eventually die, leading to the death of the entire plant.

So, the answer is:
- The plant will die.

#### (iv) Conclusion: The _______ transports _______ from the _______ to all parts of the plant.
- The phloem transports organic nutrients (sugars) from the leaves to all parts of the plant.

So, the completed sentence is:
- The phloem transports organic nutrients (sugars) from the leaves to all parts of the plant.

---

Final Answers:

#### Section 1:
1. X: Xylem
2. Y: Phloem
3. The function of Y is to transport organic nutrients (sugars) produced by plants during photosynthesis to other parts of the plant.
4. Water moves in the stem through the xylem tubes from the roots to the leaves to carry out photosynthesis.

#### Section 2:
1. The part above the ring becomes swollen/bulging.
2. Food transported by the phloem accumulates here. But there are no phloem tissues to transport the food down.
3. The plant will die.
4. The phloem transports organic nutrients (sugars) from the leaves to all parts of the plant.

---

Boxed Final Answer:

\[
\boxed{
\text{X: Xylem, Y: Phloem, Organic nutrients (sugars), photosynthesis, xylem tubes, leaves, photosynthesis, swollen/bulging, phloem, phloem, die, phloem, organic nutrients (sugars), leaves}
}
\]