Which kind of therapy was given in \(1990\) to a four­year­old girl with adenosine deaminase \((ADA)\) deficiency ?

Select the incorrect statements with reference to Rh grouping :
A. Erythroblastosis foetalis is a condition observed having foetus with \(Rh ^{-v e}\) blood and mother with Rh \(+v e\) blood.
B. Rh antigen is observed on RBCs in the majority of human beings.
C. Before blood transfusion, Rh group should also be matched.
D. Rh incompatibility is observed when a pregnant mother is \(Rh ^{-v e}\) and the foetus is \(Rh ^{+v e}\).
E. Erythroblastosis foetalis can be avoided by administering anti-Rh antibodies to the mother immediately after the delivery of the second child.
Choose the answer from the options given below :

In higher vertebrates, the immune system can distinguish self­cells and non-­self. If this property is lost due to genetic abnormality and it attacks self­cells, then it leads to

In a population of a grasshopper species, the chromosome number of some members is 23 and some other members possess 24 chromosomes. The 23 and 24 chromosome-bearing members in this species are :

A diagram showing axon terminal and synapse is given. Identify correctly at least two of \(A - D\).

Pigment containing membranous extensions in some cyanobacteria are

Attachment of spindle fibers to kinetochores of chromosomes becomes evident in

A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is \(20\; m/s^2\) at a distance of \(5\; m\) from the mean position. The time period of oscillation is

Which one of the following is wrong for fungi?

The following two reactions give the same foul smelling product Z.

X and Z, respectively, are :

The rate constant of the reaction \(A\rightarrow B\) is \(0.6 \times 10^{-3}\, mol\, L^{-1}\, s^{-1}.\) If the concentration of \(A\) is \(5\, M,\) then concentration of \(B\) after \(20\) minutes is ......... \(M.\)

The given electrical network is equivalent to

Which of the following \(Bt\) crops is being grown in India by the farmers?