Epiphytes that are growing on a mango branch is an example of which of the following?

To obtain virus ­ free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken?

The total Lung Capacity (\(TLC\)) is the total volume of air accomodated in the lungs at the end of a forced inspiration. This includes

A population of a species invades a new area. Which of the following condition will lead to Adaptive Radiation ?

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 :

Which of the following is incorrectly matched?

Select the incorrect statement with respect to acquired immunity.

Assertion \((A):\) A person goes to high altitude and experiences 'altitude sickness' with symptoms like breathing difficulty and heart palpitations. Reason \((R):\) Due to low atmospheric pressure at high altitude, the body does not get sufficient oxygen. In the light of the above statements, choose the correct answer from the options given below.

Let \(T_{1}\) and \(T_{2}\) be the energy of an electron in the first and second excited states of hydrogen atom, respectively. According to the Bohr's model of an atom, the ratio \(T _{1}: T _{2}\) is

In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with \(Fe ^{3+}\) due to the formation of-

Perigynous flowers are found in

If \(\mathrm{E}\) and \(\mathrm{G}\) respectively denote energy and gravitational constant, then \(\frac{\mathrm{E}}{\mathrm{G}}\) has the dimensions of :

If the distance between two consecutive base pairs is \(0.34\, nm\) and the total number of base pairs of a \(DNA\) double helix in a typical mammalian cell is \(6.6 \times 10^{9}\) \(bp,\) then the length of the \(DNA\) is approximately