Primary productivity does not depends upon which one of the following factors?

Match List I with List - II.

List - 1	List - II
(A) Biocontrol agent	(I) Aphids
(B) Mycorrhiza	(II) Methanobacterium
(C) Ladybird	(III) Trichoderma
(D) Biogas	(IV) Glomus

Choose the correct answer from the options given below :

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 given passage and answer the following questions:
Secondary treatment or biological treatment: The primary effluent is passed into large tanks where air is pumped into it. This allows vigorous growth of aerobic microbes. While growing, these microbes consume the major part of the organic matter in the effluent. This significantly change the BOD (biochemical oxygen demand) of the effluent. The effluent in then passed into a tank a small part of the sludge is pumped back into the aeration tank to serve as the inoculum. The remaining major part of the sludge is pumped into large tanks called sludge digesters. Here, other kinds of bacteria grow anaerobically in the sludge. The biogas produced can be used source of energy as it is inflammable. The effluent from the secondary treatment plant is generally released into natural water bodies like rivers and streams.
Which of the following gas is not produced in anaerobic digestion?

Which of the following crosses is showing a Test cross?

Match List-I with List-II

List-I (Interspecific interaction)	List-II (Species A and B respectively)
(A) Commensalism	(I) - ; -
(B) Amensalism	(II) + ; -
(C) Competition	(III) + ; 0
(D) Predation	(IV) - ; 0

'+' = beneficial interaction; '-' = detrimental interaction; '0' = neutral interaction
Choose the correct answer from the options given below:

Read the given paragraph carefully and answer the following questions:
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). There are some basic steps in genetically modifying an organism (i) identification of DNA with desirable genes; (ii) introduction of the identified DNA into the host; (iii) maintenance of introduced DNA in the host and transfer of the DNA to its progeny. Agrobacterium tumifaciens, a pathogen of several dicot plants is able to deliver a piece of DNA known as 'T-DNA' to transform normal plant cells into a tumor and direct these tumor cells to produce the chemicals required by the pathogen. Other molecules can be removed by appropriate treatments and purified DNA ultimately precipitates out after the addition of chilled ethanol. Selection of recombinants due to inactivation of antibiotics is a cumbersome procedure because it requires simultaneous plating on two plates having different antibiotics. Therefore, alternative selectable markers have been developed which differentiate recombinants from non-recombinants on the basis of their ability to produce colour in the presence of a chromogenic substrate. In this, a recombinant DNA is inserted within the coding sequence of an enzyme, ß-galactosidase. This results into inactivation of the gene for synthesis of this enzyme, which is referred to as insertional inactivation.
The purified DNA ultimately precipitates after the addition of:

If the objective function \(z = 4x + 3y\) has maximum value on a line joining points (3, a) and (b, 2) where \(a > 0, b > 0\) such that \(a - b = 2\) then the maximum value of z is:

Which of the following statement(s) is/are correct with reference to electrophilic aromatic substitution of \(\text{C}_6\text{H}_5\text{Cl}\)?
(A) Cl acts as an activating and o/p directing group
(B) Cl acts as a deactivating and o/p directing group
(C) acts as an activating and m directing group
(D) Cl acts as a deactivating and m directing group
(E) Presence of \(\text{NO}_2\) at p-position facilitates the reactions
Choose the correct answer from the options given below :

Aneuploidy refers to the:

Arrange the following carboxylic acids in increasing order of their acid strength.
A. \(CH _3 COOH\)
B. \(CH _3 CH _2 COOH\)
C. \(C _6 H _5 CH _2 COOH\)
D. \(C _6 H _5 COOH\)
Choose the correct answer from the options given below:

The adaptive radiation is represented by which of the following?
(A) Darwin's finches
(B) Koala and Wombat
(C) Tiger cat and Sugar glider
(D) Spotted cuscus and lemur
(E) Anteater and Numbat
Choose the correct answer from the options given below :

Match List I with List II

LIST I	LIST II
A. \(\left( \frac{dy}{dx} \right)^2 + \frac{dy}{dx} + 5 = 0\)	I. order 3, degree 1
B. \(xy \frac{d^2y}{dx^2} + x \left( \frac{dy}{dx} \right)^2 - y \frac{dy}{dx} = 0\)	II. order 2, degree 2
C. \(\left( \frac{d^2y}{dx^2} \right)^2 + \frac{dy}{dx} = 0\)	III. order 2, degree 1
D. \(\frac{d^3y}{dx^3} + 2\frac{d^2y}{dx^2} + \frac{dy}{dx} = 0\)	IV. order 1, degree 2

Choose the correct answer from the options given below: