The shape of the growth curve characteristic of a living organism growing in natural environment is:

 

1.	Linear	2.	Sigmoid
3.	Hyperbola	4.	Bell shaped

Plant growth and further development is intimately linked to water status of the plant because:
A. Turgidity of cells helps in extension growth
B. It provides medium for enzymatic activity
1. Both A and B are correct                             
2. Only A is correct
3. Only B is correct                                         
4. Both A and B are incorrect

The optimum temperature range for proper growth in most plants is:

Consider the given diagram and select the correct inference:

To differentiate into a tracheary element, a cell would:
1. Gain protoplasm
2. Become multinucleate
3. Assimilate lot of collagen and elastin
4. Develop lignocellulosic secondary cell wall

Formation of interfascicular cambium and cork cambium is possible most importantly because of:

The growth in plants can be best expressed as [refer Section 15.2]:

Development is a term that includes all changes that a plant goes through during its life cycle:
1. till germination of the seed
2. during its vegetative growth
3. from germination till flowering
4. from germination to senescence

Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:

Difference in shapes of leaves produced in air and those produced in water represents heterophyllous development due to environment in: