CBSE · Biology
Plant - Growth and Development
38 practice questions for CBSE — 19 easy · 19 medium · 0 hard. Every question is graded instantly with a step-by-step solution when you miss it.
Start free practice →Sample questions
MCQ
The first Cytokinin was discovered by ----(A)------ during investigation of callus tissue culture of ------(B)----
MCQ
The process of seed germination is stimulated due to the synthesis of hydrolytic enzymes. Which hormone is responsible for this process?
MCQ
Which hormone stimulates formation of lateral and adventitious roots?
MCQ
Which of the following plants require longer duration of light than the critical photoperiod, for flowering?
MCQ
In which phase of plant growth, the rate of growth slows down and comes to a steady state?
MCQ
While describing the dynamics of cell growth, the ratio of change in number of cells over the time interval is called ____.
MCQ
If a leaf is 50 $\text{cm}^2$ in size and the growth rate per day is 5 $\text{cm}^2$ , then its relative growth rate would become ------------.
MCQ
Given below are two statements about vernalization. Statement I - Generally vernalization is effective at seed stage in annual plants. Statement II - The site of vernalization is believed to be shoot apical meristem. In…
MCQ
Given below are two statements: Statement (I): SDP require long uninterrupted dark period for flowering. Statement (II): If dark period is interrupted even by a flash of light, SDP will flower. In light of the above…
MCQ
What is true about Arithmetic and Geometric growth curves?
MCQ
Geometric growth can be expressed mathematically by the equation $W_1=W_0e^{rt}$. '$W_1$' stands for ________.
MCQ
In some plants, fruits develop without fertilization because the placental tissue of unfertilized ovary produces