Which one of the following human ancestors probably lived in East African grasslands two million years ago?

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 :

Select one of the given options which includes all sexually transmitted infections.

About ______ the first cellular forms of life appeared on earth.

Who proposed the concept 'saltation' in evolution?

Match List-I with List-II

List-I (Types of evolution)	List-II (Examples)
(A) Divergent evolution	(I) Moths
(B) Adaptive radiation	(II) Eyes of octopus and mammals
(C) Convergent evolution	(III) Darwin's finches
(D) Industrial melanism	(IV) Thorn of Bougainvillea and tendrils of Cucurbita

Choose the correct answer from the options given below:

The first restriction endonuclease to be isolated was :

Of the incident solar radiation, what is the percentage of photosynthetically active radiation (PAR)?

Read the following paragraph and answer the given questions:
In order to link the alien DNA, the vector needs to have very few, preferably single, recognition sites for the commonly used restriction enzymes. Presence of more than one recognition site in the vector will generate several fragments, which will complicate the gene cloning. In order to link the alien DNA, the vector needs to have very few, preferably single, recognition sites for the commonly used restriction enzymes. Presence of more than one recognition sites within the vector will generate several fragments, which will complicate the gene cloning. The ligation of alien DNA is carried out at a restriction site present in one of the two antibiotic resistance genes. The recombinant plasmids will lose tetracycline resistance due to insertion of foreign DNA but can still be selected out from non-recombinant ones by plating the transformants on tetracycline containing medium.
The recombinants will grow in ampicillin containing medium but not on that containing tetracycline. But, non- recombinants will grow on the medium containing both the antibiotics. In this case, one antibiotic resistance gene helps in selecting the transformants, whereas the other antibiotic resistance gene gets 'inactivated due to insertion' of alien DNA, and helps in selection of recombinants. Origin of replication (ori) is a sequence from where replication starts and any piece of DNA when linked to this sequence can be made to replicate within the host cells. This sequence is also responsible for controlling the copy number of the linked DNA. So, if one wants to recover many copies of the target DNA it should be cloned in a vector whose origin support has high copy number.
Which one of the given sites is commonly used by the restriction enzyme?

Match List - I with List - II.

List – I	List – II
(A) Typhoid	(I) Lungs
(B) Pneumonia	(II) Respiratory Passage
(C) Common cold	(III) RBC and liver
(D) Malaria	(IV) Small intestine

Choose the correct answer from the options given below:

Consider the following statements for the order of a reaction and choose the correct statements.
(A). The order of a reaction is an experimental quantity.
(B). Order can be zero.
(C). Order can be fractional value.
(D). Order is applicable to elementary as well as complex reactions.
Choose the correct answer from the options given below :

A molecule X associates in a given solvent as per the following equation: \(X \rightleftharpoons(X) n\). For a given concentration of \(X\), the van't Hoff factor was found to be \(0 . 8 0\), and the fraction of associated molecules was \(0 . 3\). The correct value of ' \(n\) ' is:

Which one of the followings is not a transgenic animal?