Assertion: Etiolation is an energy conserving strategy in plants.
Reason: It helps plants growing in the dark reach the light before they die.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both the assertion and reason are false

Assertion: Auxin, produced predominantly in shoot tips, is transported from cell to cell down the stem and this is called as polar transport.
Reason: The polar transport is due to the gravitational forces.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

Assertion: If leaves removed from a plant are dipped in a cytokinin solution, they stay green much longer than otherwise:
Reason: Cytokinins have an anti-aging effect of certain plant organs like leaves.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

Assertion: The levels of ABA may increase 100-fold during seed maturation.
Reason: The high levels of ABA in maturing seeds inhibit germination.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

What is incorrect regarding the results of experiments conducted on coleoptiles of canary grass and oats by Charles Darwin and Francis Darwin on phototropism?
1. Both plants grow toward the light source.
2. The tips of coleoptiles were covered with a metal foil and the coleoptiles did not grow toward light.
3. When the metal foil was removed they still not grew toward the light.
4. The growing region of the coleoptiles rather than their tips was covered and the coleoptiles grew toward the light.

Plant growth regulators do not:
1. act by altering gene expression.
2. have multiple effects.
3. function independently of other hormones.
4. control cell division and cell differentiation

The control of apical dominance is due to interaction of auxins, cytokinins and a newly discovered plant hormone called as:
1. Brassinosteroids
2. Jasmonates
3. Salicylic acid
4. Strigolactones

Many mutants that are especially prone to wilting are deficient in:
1. ABA
2. Ethylene
3. Cytokinins
4. Gibberellins

Hyponastic response in submerged plants may be due to auxin and:
1. ABA
2. Ethylene
3. Cytikinin
4. Gibberellins

The newly discovered PGR brassinosteroids have effects qualitatively similar to:
1. Auxins
2. Gibberellins
3. Cytokinins
4. Ethylene