STANDARD Botany Plant Growth And Development Class 11 Questions

Highest growth is found in

Assertion (A) : Measurement and comparison of the total plant growth per unit time is not absolute growth rate. Reason (R) : The growth of given system per unit time as percentage of initial size is called the relative growth rate What of the following is true?

Growth can be measured in various ways. Which of these can be used as parameters to measure growth

Plasticity in plant growth means that

Exponential growth in plants can be expressed as

Mark the correct statements w.r.t. meristematic tissues (A) The meristem that occurs at the tip of roots and shoots contributes to the formation of the primary plant body. (B) The lateral meristems are responsible for producing the secondary tissues. (C) Some cells 'left behind' from the lateral meristem, constitute the axillary bud. (D) The cells which are structurally and functionally specialised and lose the ability to divide are called meristems.

Correct sequence of the development process in a plant cell

Absolute growth rate is defined as the

Which of the following represents the correct sequence of the development process in a plant cell?

What is the site of perception of photoperiod necessary for induction of flowering in plants?

The exponential growth can be expressed as W1 = W0ert. What is ‘r’ in the expression?

Bakane disease in paddy is caused by

Which of the following prevents falling of fruits or Fruit and leaf drop at early stages can be prevented by the application of

It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?

One of the synthetic auxins is

Ethylene is not directly applied in the field as a gas due to its high diffusion rate. Which compound is used to overcome this limitation?

Functions not induced by Cytokinins i. Production of leaves ii. Production of chloroplasts iii. Nutrient mobilization iv. Leaf senescence v. Xylem differentiation vi Synthesis of carotenoids

The rate of growth of any organism follows Or Typical growth curve in plants is

Assertion : Stem develops from hypocotyl of embryo. Reason : Internodes bear axillary buds.