Introduction to Transport in Plants

Explain why xylem transport is unidirectional and phloem transport bi-directional.

1. Water
2. Soil
3. Mineral and organic nutrients
4. Hormones

Flowering dependent on cold treatment is

1. Vernalisation

2. Cryotherapy

3. Cryopscopy

4. Cryogenics

Explain why xylem transport is unidirectional and phloem transport bi-directional.

What are the forms in which water occurs in the soil?

Water is essential for all living organisms because

1. It is a universal solvent

2. Protoplasm of the cell is nothing but water

3. It is the medium through which solutes are transported

4. All of these

1. Archaebacteria
2. Blue-green algae
3. Eubacteria
4. Saprophytic fungi

1. Hygroscopic water
2. All of these
3. Capillary water
4. Gravitational water

1. Gravitational water
2. Capillary water
3. Hygroscopic water
4. Both a and c

1. Water and solutes move through the sieve tube along a pressure gradient
2. Root tips, stem tips and fast growing storage organs are considered as sink regions in phloem transport
3. Sieve tubes in a source leaf have a low hydrostatic pressure
4. Sucrose is swept along by the bulk flow of water in sieve tubes

Mention any two important features of Water that enable it to sustain life on Earth.

Which one is the major route for water transport, primary xylem or secondary xylem?

1. Moisture
2. Aerobic condition
3. Differentiated tissues
4. Low temperature

1. Dependent on osmosis
   
2. Dependent on water absorption
3. Dependent on strength of solution
4. None of the above.

Water is essential for all living organisms because

1. It is a universal solvent

2. Protoplasm of the cell is nothing but water

3. It is the medium through which solutes are transported

4. All of these

1. nucleus
2. cytoplasm
3. flagella
4. cell wall

1. Gravitational water
2. Capillary water
3. Hygroscopic water
4. All of these

1. Organic compounds synthesized in the leaves are transported to storage organs only.

2. Organic and mineral nutrients undergo multi-directional transport.

3. The mineral nutrients present in the stem and leaves get transported to roots.

4. Hormones and other chemical stimuli are not transported from their sites of synthesis.

1. a-iii, b-ii, c-iv, d-i
2. a-ii, b-iii, c-i, d-iv
3. a-iv, b-iii, c-i, d-ii
4. a-iii, b-iv, c-ii, d-i

In flowering plants the substances that would need to be transported are__________.

1. Water and mineral nutrients only

2. Mineral nutrients and organic nutrients only

3. Water and plant growth regulators only

4. Water, mineral nutrients, organic nutrients and hormones

1. Mineral water
2. Soil water
3. Field capacity
4. Gravitational capacity

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

In flowering plants the substances that would need to be transported are__________.

1. Water and mineral nutrients

2. Mineral nutrients and organic nutrients

3. Water and plant growth regulators

4. Water, mineral nutrients, organic nutrients and hormones

1. Capillary water
2. Storage water
3. Field capacity
4. Gravitational water

1. Four
2. Three
3. One
4. Two