What is the primary function of the aeration tanks in the secondary treatment of sewage?

Match List I with List II.

LIST I	LIST II
A. Haemophilus influenzae	I. Elephantiasis
B. Rhino viruses	II. Ringworm
C. Wuchereria bancrofti	III. Common cold
D. Trichophyton	IV. Pneumonia

Choose the correct answer from the options given below:

The exine of pollen grains is made up of :

Read the following passage carefully and answer the given questions.
Bioactive molecule, cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum. Statins produced by the yeast Monascus purpureus have been commercialised as blood-cholesterol lowering agents. It acts by competitively inhibiting the enzyme responsible for synthesis of cholesterol. Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. They have been shown to have no negative impacts on plants, mammals, birds, fish or even on non-target insects. BOD refers to the amount of the oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria. The sewage water is treated till the BOD is reduced. Cheese, is one of the oldest food items in which microbes were used. Different varieties of cheese are known by their characteristic texture, flavour and taste. For example, the large holes in ‘Swiss cheese’ are due to production of a large amount of CO₂ by a bacterium named Propionibacterium sharmanii.
The greater the BOD of waste water-

Read the passage carefully and answer the questions based on the passage:
Pollen pistil interaction involves all events from the landing of pollen grains on the stigma until the pollen tube enters the embryo sac (when the pollen is compatible). When a pollen tube grows through the style and enters into the ovules, it finally discharges two male gametes in one of the synergids. Syngamy and triple fusion are two fusion events occur in angiosperms. Thus, angiosperms exhibit double fertilization. The products of these fusions are the diploid zygote and triploid primary endosperm nucleus. Zygote develops into embryo and primary endosperm cell forms the endosperm tissue. The developing embryo passes through different stages before maturation.
Formation of diploid zygote is a result of:

Which one of the following is a result of convergent evolution?

Health is a state of:

A system consists of two protons and one electron. They are separated by a distance of 1 \(\text{\AA}\) from each other. If the potential energy at infinity is taken to be zero, the potential energy of the system is

Match List-l with List-ll
Let \(A\) be any invertible square matrix. Then

List-l	List-ll
(A) \(A-A^T\)	(I) \(|A| A^{-1}\)
(B) \(A A^T\)	(II) Skew-symmetric
(C) \(\operatorname{det}\left(A^{-1}\right)\)	(III) Symmetric
(D) \(\operatorname{adj} A\)	(IV) \([\operatorname{det}(A)]^{-1}\)

Choose the correct answer from the options given below :

If the corner points of the bounded feasible region for a Linear Programming Problem (LPP) are \(A(0,2), B(3,0), C(2,3)\) and \(D(3,1)\), then the maximum value of the objective function \(Z=4 x+2 y\) occurs at

The differential equation of the family of parabolas \(y^2=4 a x\) where \(a\) is an arbitrary constant is :

0.01 molal aqueous solutions of strong electrolytes \(NaCl , KCl , MgSO _4\) and \(K _2 SO _4\) are prepared.Which of the following statements is correct regarding their osmotic pressure ? (Assume complete dissociation of solute particles)

Which of the following pairs of transition metal ions is the strongest oxidizing agent?