Factors Affecting Plant Growth

Q.

Match of following columns

$\begin{array}{cc}\text{column-I}& \text{column-II}\\ \text{A.Water}& \text{1.Release of metabolic energy}\\ \text{B.Oxygen}& \text{2.Optimum enzymatic activity}\\ \text{C.Nutrients}& \text{3.Cell enlargement/turgidity}\\ \text{D.Temperature}& \text{4.Synthesis of protoplasm}\end{array}$

1. A - 3 , B - 4 , C - 2 , D - 1

2. A - 1, B - 2 , C - 3, D - 4

3. A - 4 , B - 3 , C - 2 , D - 1

4. A - 3 , B - 1 , C - 4 , D - 2

Q.

Few normal seedlings of tomato were kept in a dark room. After a few days, they were found to have become white-colored like albinos. Which of the following terms will you use to describe them?

1. Mutated

2. Embolised

3. Etiolated

4. Defoliated

Q. Match of factors affecting growth to their functions.

1. Nutrient transport
2. Enzymatic activity
3. Respiration
4. Functional
   activities

Q. Growth is primarily affected by two climatic factors which are

1. light and temperature
2. light and soil nitrogen
3. wind and soil
4. Humidity and phytohormones

Q. Select out the incorrect match with respect to plant growth requirements among the following:

1. Water $\to$ Cell metabolism
2. Minerals $\to$ Osmotic regulation
3. Oxygen $\to$ Enzyme activation
4. Light $\to$ Flowering

Q. Assertion :- Oxygen is compulsory for growth of all organisms.
Reason:- Oxygen is must for releasing metabolic energy essential for growth.

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

Q. Assertion: Plant growth and development is intimately linked with the water status of plant cells.
Reason: Guttation is the process of water loss from hydathodes.

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

Q. In sigmoid growth curve, the exponential phase slows down leading to a stationary phase due to

1. halting of respiration
2. genetic nature
3. limited nutrient supply
4. absence of differentiation

Q. Leaves of many grasses are capable of folding and unfolding because they

1. are very thin
2. are isobilateral
3. have specialized bulliform cells
4. have parallel vascular bundles

Q. Which of the following is not an example for plant growth?

1. The length of a wooden log thrown in a river increases by 1 centimeter
2. Annual ring formation
3. Formation of cambium
4. A plant of 1m in length becomes a 2m long plant