Which of the following cause increase in the girth of the plant organ in which they are active?

a. Vascular cambium b. Root apical meristem c. Cork cambium d. Shoot apical meristem

Which of the following statements is/are false?

a. In dicotyledonous plants and gymnosperms, the lateral meristems appear very early in life. b. Plant growth is accompanied by both anabolic and catabolic processes. c. The ability of plants for unlimited growth throughout life is due to the presence of meristems at certain locations in their body.

The period of growth is divided into three phases. Which of the following is not a property of the cells of meristematic phase?

Which of the following plant growth regulators is/are not involved in growth promoting activities?

Which of the following statements is/are false regarding the phase of maturation?

a. The cells in this phase attain their maximal wall thickening. b. The cells in this phase attain their maximal protoplasmic modifications. c. The cells in this phase have increased vacuolation.

During differentiation, the cells undergo structural changes. Which of the following changes do(es) not occur in differentiation?

a. The cells lose their protoplasm. b. The cells regain the capacity of division under certain conditions. c. The cells develop a very strong, elastic lignocellulosic secondary cell wall.

Both intrinsic and extrinsic factors control the development in plants. Which of the following factors are intrinsic?

a. Temperature b. Nutrition c. Genetics d. Growth regulators

Which of the following plant growth regulators is/are sprayed on juvenile conifers to hasten their maturity period?

Which of the following scientists isolated auxin from the tips of coleoptiles of oat seedlings?

Match the following: Medium of growth of plants|Function| |a. Water|1. It helps in releasing metabolic energy essential for growth activities.| |b. Oxygen|2. It is required by plants for the synthesis of protoplasm and it acts as a source of energy.| |c. Nutrient|3. It provides the medium for enzymatic activities that is needed for growth.|

Which of the following statements is/are false?

a. Heterophylly in cotton and coriander is an example of plasticity. b. Cells positioned away from root apical meristems differentiate as root-cap cells. c. The growth of the given system per unit time expressed as per unit initial parameter is called the absolute growth rate.

Match the following: Plant growth regulators|Examples| |a. Adenine derivative|1. Abscisic acid| |b. Derivative of carotenoids|2. Kinetin| |c. Terpenes|3. Gibberellic acid|

The rise in rate of respiration during the ripening of fruits is called respiratory climacteric. Which of the following plant growth regulators is responsible for this?

Growth is measured by a variety of parameters. In a single maize root apical mersitem, growth is expressed as the

Which of the following is not a use of auxins?