According to fossil record, the earliest fossils of liverworts are found in late Devonian, of mosses in early cretaceous, and vascular plants in the later Silurian/early Devonian. Anthoceros (hornworts) fossils have not been recovered. Reading fossil recores we would say that vascular plants appeared first and then liverworts.

However phylogenetic relationship (shown in figure) suggest otherwise. It may be that
(A) evolutionary history can be read directly from fossil record
(B) The moss lineage goes back to at least early Silurian/early Devonian
(C) Fossil can only set a maximum age for a lineage
(D) Fossil can only sets a minimum age for a lineage
(E) the divergence between liverworts and rest of land plants goes back to at least early Ordovician
Which of the following statements is correct?
 

TLS Online TPP Program

#Question id: 13222

#Unit 6. System Physiology – Plant

More mature regions of the root often have an outer layer of protective tissue, called an

TLS Online TPP Program

#Question id: 13223

#Unit 6. System Physiology – Plant

At the endodermis, which pathway is blocked by the Casparian strip

TLS Online TPP Program

#Question id: 13224

#Unit 6. System Physiology – Plant

Suberin is

TLS Online TPP Program

#Question id: 13225

#Unit 6. System Physiology – Plant

 The three elements are not considered mineral nutrients these are-

TLS Online TPP Program

#Question id: 13226

#Unit 6. System Physiology – Plant

Mengel and Kirkby  have proposed that the essential elements be classified instead according to their biochemical role and physiological function, It shows such a classification, in which plant nutrients have been divided into some basic groups these are;

a.) The first group is nutrients that are part of carbon compounds

b.) The second group is important in energy storage reactions or in maintaining structural integrity

c.) The third group has important roles in reactions involving electron transfer or redox reaction

d.) The fourth group is present in plant tissue as either free ions or ions bound 

Which one of the following group represents CORRECT statements

TLS Online TPP Program

#Question id: 13227

#Unit 6. System Physiology – Plant

Match the following  Special Techniques Are Used in Nutritional Studies;

A.) Hydroponic growth system	1.) plant roots lie on the surface of a trough, and nutrient solutions flow in a thin layer along the trough over the roots and this system ensures that the roots receive an ample supply of oxygen
B.) Nutrient film growth system	2.) In this technique, plants are grown with their roots suspended in air while being sprayed continuously with a nutrient solution, This approach provides easy manipulation of the gaseous environment around the root
C.) Aeronic growth system	3.) The technique of growing plants with their roots immersed in nutrient solution without soil and requires a large volume of nutrient solution or frequent adjustment of the nutrient solution to prevent nutrient uptake by roots from producing radical changes in nutrient concentrations and pH of the medium.

Which of the following combination is correct ?