Which one is not the example of an invasive alien species?

The ability of some snails and fish to avoid summer related problems like heat and dessication is called

Match List I with List II

List I	List ll
(A) Dodo	(I) Africa
(B) Quagga	(II) Russia
(C) Thylacine	(III) Mauritius
(D) Steller Sea Cow	(IV) Australia

Choose the correct answer from the options given below:

EcoRl, a significant tool in rDNA technology is -

All food chains begin with producers, except -

A typical angiosperm anther is generally:

Which one of the following layers of microsporangium nourishes the developing pollen grains?

DNA recombinant technology involves the use of restriction endonucleases. After having cloned the gene of interest and having optimised the conditions to induce the expression of the target protein, one has to consider producing it on a large scale. The cells harbouring cloned genes of interest may be grown on a small scale in the laboratory. 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. In Biolistics or gene gun method cells are bombarded with high velocity micro particles of gold or tungsten coated with DNA. The ligation of alien DNA is carried out at a restriction site present in one of the two antibiotic resistance genes. For example, you can ligate a foreign DNA at the BamH I site of tetracycline resistance gene in the vector pBR322. Since the DNA is enclosed within the membranes, we have to break the cell open to release DNA along with other macromolecules such as RNA, proteins, polysaccharides and also lipids. The RNA can be removed by treatment with ribonuclease whereas proteins can be removed by treatment with protease. Other molecules can be removed by appropriate treatments and purified DNA ultimately precipitates out after the addition of chilled ethanol.
If any protein encoding gene is expressed in a heterologous host, it is called as

A bag contains 4 red and 6 green balls. A ball is drawn at random, its colour is noted and is returned to the bag.
One additional ball of the colour drawn is put in the bag. Again a ball is then drawn from the bag. The probability of this ball to be of green colour is

Which of the following disorders are the results of aneuploidy?
(A) Haemophilia
(B) Down's Syndrome
(C) Thalassemia
(D) Turner's Syndrome
Choose the correct answer from the options given below:

Which of the following functions is onto?

The function \(f(x)=\frac{x-1}{x\left(x^2-1\right)}, x \neq 1, f(1)=1\), is discontinuous at:

Two point charges of 1 C each are separated from each other by a distance of 1 m in vacuum.
The force of interaction between them is: