About __________ the first cellular forms of life appeared on earth

The point mutation arise due to change in :

Which of the following species has become extinct due to over exploitation by humans?

Which one of the following techniques are used for early detection of the diseases?

Which one of the following step is not involved in the genetic modification
of an organism?

Which one of the following hormones is essential for maintenance of endometrium?

Arrange the following steps involved in Frederick Griffith experiment in correct order.
(A) When R-strain was injected into mice, the mice remained alive.
(B) When heat killed S-strain was injected into mice, the mice remained alive.
(C) The Streptococcus pneumoniae bacteria grown on a culture plate to produce the S and R strain colonies.
(D) When S-strain was injected into mice, the mice died.
(E) When heat killed S-strain + live R-strain was injected into mice, the mice died.
Choose the correct answer from the options given below :

When silver or gold is leached as follows,
\(4M + 8CN^- + 2H_2O + O_2 \rightarrow\) _______, the product is :
(M = Ag or Au)

Determinant is unaltered if :

If an asset costs Rs. 50,000 with an estimated useful life of 6 years and a scrap value of Rs. 5000. Then by using a linear depreciation method, the annual depreciation of the asset will be:

Answer the question on basis of passage given below :
The noble gases have closed shell electronic configuration and are monatomic gases under normal conditions. The low boiling points of lighter noble gases are due to the weak dispersion forces between the atoms and the absence of other inter atomic interaction. The direct reaction of xenon with fluorine leads to
of compounds with oxidation numbers +2, +4 and +6.
XeF4 reacts violently with water to give XeO3. The compound of Xenon exhibit stereoisomerism and their geometries can be deduced considering the total number of electrons in the valence shell.
Argon is used in arc welding because it has

The simplest form of \(\tan ^{-1}\left(\frac{x}{\sqrt{a^2-x^2}}\right)\) is, where \(-a < x < a\).

If \(f:[3, \infty) \rightarrow A\) defined by \(f(x)=x^2\) is an onto function, then \(A\) is: