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TLS Online TPP Program

#Question id: 37888

Assertion (A): Tracheary element differentiation is considered an irreversible process. 
Reason (R): During differentiation, the cells lose their nuclei and cytoplasm, preventing dedifferentiation or redifferentiation.

Select the correct option:

#Plant Biotechnology
  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is not the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
More Questions
TLS Online TPP Program

#Question id: 56

#Biochemistry

Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates, but not by other organisms such as bacteria or plants?
TLS Online TPP Program

#Question id: 57

#Biochemistry

A(n) ________ has charge but negligible mass, whereas a(n) ________ has mass but no charge.
TLS Online TPP Program

#Question id: 58

#Biochemistry

A covalent chemical bond is one in which ________.
TLS Online TPP Program

#Question id: 59

#Biochemistry

Nitrogen (N) normally forms three covalent bonds with a valence of five. However, ammonium has four covalent bonds, each to a different hydrogen (H) atom (H has a valence of one). What do you predict to be the charge on ammonium?
TLS Online TPP Program

#Question id: 60

#Biochemistry

Which of the following is true for the reaction?

3H2 + N2   2NH3
TLS Online TPP Program

#Question id: 61

#Biochemistry

Which of the following correctly describes chemical equilibrium?