Selina solutions for Concise Biology [English] Class 8 ICSE chapter 1 - Transportation in Plants [Latest edition]

Diffusion occurs when molecules move:

Ascent of sap in plants takes place through:

If the xylem vessels of a plant are plugged:

Force responsible for the ascent of sap is:

Multiple Choice Question:

Put a tick mark (✓) against the correct alternative in the following statement:

Raisins swell when put in:

Multiple Choice Question:

Put a tick mark (✓) against the correct alternative in the following statement:

The root-hairs are suited for absorbing water from the soil because:

Transpiration is defined as:

Which one of the following favours the fastest transpiration rate?

An experiment was set up as shown in the figure below. After some time, the Water level in test tube A fell down but not in test tube B.

Why was there a fall in the water level of test tube A and not in that of test-tube B?

How are roots useful to the plants? Give any two points.

What do xylem vessels carry?

Name the plant tissue which helps in carrying the food to different parts of a plant.

Define the term semi-permeable membrane.

Define the term osmosis.

Under what conditions do plant transpire more quickly?

Under what conditions do plant transpire most slowly?

Given alongside is an enlarged diagram of a part of the root. Draw arrows on the diagram to show the movement of water passing through different parts.

Why is the structure of the root hair is quite suitable for absorbing water from the soil ?

Briefly explain, how transpiration helps in upward conduction of water in plants?

How does temperature, light intensity and wind affect transpiration?

The set up shown alongside was kept in sunlight for an hour. It was observed that drops of water appeared on the inside of the polyethylene bag.

1. Name the process which is being demonstrated.
2. Why was the pot and its soil left uncovered by the polythene bag?
3. Why was the pot left in the sunlight?
4. Suppose the pot in this experiment was placed inside a dark room instead of placing it in sunlight for some time. What difference will be noticed?

State whether the following statement is true or false. Rewrite the false statement correctly.

Water absorption mainly occurs through the root-hair.

State whether the following statement is true or false. Rewrite the false statement correctly.

Water enters the root-hair by osmosis.

State whether the following statement is true or false. Rewrite the false statement correctly.

Water absorbed by the roots reaches the leaves and is used in producing food for the entire plant.

State whether the following statement is true or false. Rewrite the false statement correctly.

A semi-permeable membrane allows larger molecules to pass through, but prevents the smaller ones.

State whether the following statement is true or false. Rewrite the false statement correctly.

Transpiration is the loss of water from the roots of the plant.

State whether the following statement is true or false. Rewrite the false statement correctly.

Transpiration cools the plant when it is hot outside.

Fill in the blank with the suitable term given below:

Transportation in plants is carried out by a __________ system.

Fill in the blank with the suitable term given below:

The upward movement of sap that contains water and minerals is called _______ of sap.

Fill in the blank with the suitable term given below:

Transpiration is more when the wind is blowing _____.

Fill in the blank with the suitable term given below:

Most water gets evaporated from the plant from its __________.

Fill in the blank with the suitable term given below:

Transpiration is reduced if the air is __________.

Fill in the blank with the suitable term given below:

The leaves have more__________ on their lower surface.

Draw a magnified view of the root-hair, and describe, how it helps in the absorption of water from the soil.

How does transpiration help the roots absorb water and minerals from the soil?

Define the three processes by which plants absorb water and minerals from the soil.

How water absorbed by the roots is important for the plants?

Name the factors which affect the rate of transpiration? State their role in each case.

Mention the two ways in which transpiration helps the plants.

Describe an experiment to show that the plant loses water through its leaves.

Name any three minerals whose deficiency causes diseases in plants. Give the symptoms of each deficiency.

List out the differences between xylem and phloem.