Given below are some stages of human evolution. Arrange them in correct sequence (Past to Recent)
(A) Homo habilis
(B) Homo sapiens
(C) Homo neanderthalensis
(D) Homo erectus
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Thorn of Bougainvillea and tendril of Cucurbita are:

Which of the following is not an Intra Uterine Device (IUD) ?

Failure to segregation of chromatids during cell division cycle which involves gain or loss of chromosome(s) is called:

A student was fascinated with the beautiful mauve colored flowers of water hyacinth, he asked his teacher to allow him to take a few plants to his village pond, but teacher denied him to do so because:

Read the following passage carefully and answer the given questions.
Restriction endonuclease on finding its specific recognition sequence, bind to the DNA and cut each of the two strands of the double helix at specific points in their sugar -phosphate backbones. Each restriction endonuclease recognises a specific palindromic nucleotide sequences in the DNA. 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. This can be achieved by treating the bacterial cells/plant or animal tissue with enzymes such as lysozyme (bacteria), cellulase (plant cells), chitinase (fungus). Now a days the most commonly used matrix is agarose which is a natural polymer extracted from sea weeds. The DNA fragments separate (resolve) according to their size through sieving effect provided by the agarose gel. The first restriction endonuclease-Hind II, whose functioning depended on a specific DNA nucleotide sequence was isolated and characterised five years later. It was found that Hind II always cut DNA molecules at a particular point by recognising a specific sequence of six base pairs. In addition to 'ori', the vector requires a selectable marker, which helps in identifying and eliminating non-transformants and selectively permitting the growth of the transformants. Transformation is a procedure through which a piece of DNA is introduced in a host bacterium. Normally, the genes encoding resistance to antibiotics such as ampicillin, chloramphenicol, tetracycline or kanamycin, etc., are considered useful selectable markers for E. coli.
Transformation is a procedure through which:

Which of the following alcoholic drink is not produced by distillation of fermented broth?

Arrange the stages of oogenesis in order of their occurance.
(A) Formation of ovum & IInd polar body
(B) Meiosis II begins but held at Metaphase II
(C) Meiosis I started but held at Prophase I
(D) Formation of primary oocyte from oogonia
(E) Completion of Meiosis-I and formation of secondary oocyte and first polar body
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The sum of the products of elements of any row with the cofactors of corresponding elements is equal to:

The maximum value of a LPP \(z=3 x+4 y\) subject to the constraints: \(x+y \leq 6, x \geq 0, y \geq 0\) is:

The sunlight reaching the earth has maximum magnetic field \(2.4 \mu T\). What is the maximum electric field in this light ? Speed of light \(=3 \times 10^8 m s ^{-1}\)

Match List - I with List - II.

List - I	List - II
(A) RNA	(I) Glycogen
(B) Invert sugar	(II) lactose
(C) Animal starch	(III) Ribose
(D) Milk Sugar	(IV) Sucrose

Choose the correct answer from the options given below :

What is the product of the following reaction?
\(R - CH _2- COOH \xrightarrow[(i i) H _2 O ]{( i ) X _2 / \text { Red phosphorus }( X = Cl , Br )}\) ?