Arrange the following events in correct sequence.
A. Transformation of morula into blastocyst.
B. Fusion of sperm with an ovum
C. Implantation
D. Initiation of mitotic division in zygote and formation of morula
Choose the correct answer from the options given below:

Arrange the steps of Polymerase chain reaction in proper sequence-
A. Selection of desired fragment of DNA
B. Annealing
C. Amplification
D. Extension
E. Denaturation
Choose the correct answer from the options given below

GnRH is secreted by:

Which one of the following is NOT the function of Leydig cells ?

Which one of the followings is a hormone releasing IUD?

The steps of PCR (Polymerase Chain Reaction) are given below. Arrange them in a correct sequence.
A. Extension of primers
B. Denaturation of DNA fragments by heating
C. Amplified DNA fragments
D. Annealing of primers
Choose the correct answer from the options given below:

Which of the following is a type of 'in-situ' conservation approach?

A sample of radioactive nuclei has a half life of 5.5 years. The fraction of sample remaining undecayed after 22 years is

The unit's digit of \(12^{12}\) is equal to :

Monochromatic lights of wavelengths 620 nm and 626 nm, respectively are used to study diffraction at a single slit of aperture 0.7 mm. The distance between the slit and the screen is 1.8 m. The separation between the positions of the first maxima of the diffraction pattern obtained in the two cases is

Match List-I with List-II

List-I (Process/terms related to ecosystem)	List-II (Explanations)
(A) Decomposition	(I) Highly resistant to microbial actions
(B) Humus	(II) Oxygen dependent process
(C) Stratification	(III) Break down of detritus
(D) Fragmentation	(IV) Distribution of species

Choose the correct answer from the options given below:

Let \(F(z)\) be the cumulative density function of the standard normal variate \(Z\), then which of the following are correct?
(A) \(F(z)=\frac{1}{\sqrt{2 \pi}} \int_{-\infty}^z e^{-t^2 / 2} d t,-\infty<Z<\infty\)
(B) \(F(-Z)=1-F(Z)\)
(C) \(F(0)=0\)
(D) \(F(\infty)=1\)
Choose the correct answer from the options given below:

Answer the question on the basis of passage given below :
One of the notable features of the transition element is the great variety of oxidation states it may show in its compounds. The elements which give the greatest number of oxidation states occur in or near the middle of the series. Manganese, for example exhibits all the oxidation states from +2 to +7. The lesser number of oxidation states at the extreme ends is either due to losing or sharing of few electrons (Sc, Ti) or too many d electrons of higher valence. Early in the first series scandium (II) is virtually unknown and titanium (IV) which is more stable than Ti (III) or Ti (II). On the other end, the only oxidation state of zinc is \(+ 2\).
Fe shows extra stability as \(Fe ^{3+}\) due to: