Select incorrect statements in reference to decomposition.
A. Decomposition rate is slower, if detritus is rich in nitrogen
B. Decomposition is largely an oxygen requiring process
C. Decomposition rate is faster if detritus is rich in lignin and chitin
D. Warm and moist environment favours decomposition
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Bacillus thuringiensis produces Bt toxin crystals it does not kill the bacterium itself as the toxin is in the:

Which of the following is not a natural method of birth control?

Bone structure of forelimbs of vertebrates like whale, bat, cheetah and human is evidence of:

Read the following passage carefully and answer the given questions.
Biofertilisers
Biofertilisers are organisms that enrich the nutrient quality of the soil and their main sources are bacteria, fungi and cyanobacteria. You have studied about the nodules on the roots of leguminous plants formed by the symbiotic association of Rhizobium. These bacteria can fix atmospheric nitrogen into organic forms. Other bacteria can also fix atmospheric nitrogen while free-living in the soil (examples Azospirillum and Azotobacter). Fungi are also known to form symbiotic associations with plants (mycorrhiza). Many members of the genus Glomus form mycorrhiza. Plants having such associations show other benefits also, such as resistance to root-borne pathogens, tolerance to salinity and drought, and an overall increase in plant growth and development. Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial environments many of which can fix atmospheric nitrogen, e.g. Anabaena, Nostoc, Oscillatoria, etc. In paddy fields, cyanobacteria serve as an important biofertiliser. Blue green algae also add organic matter in to the soil and increase its fertility. Currently, in our country, a number of biofertilisers are available commercially in the market and farmers use these regularly in their fields to replenish soil nutrients and to reduce dependence on chemical fertilisers.
Nostoc is an example of :

Match List-I with List-II

List-I (Contraceptive methods)	List-II (Examples)
(A) Barrier method	(I) LNG-20
(B) Oral method	(II) Multiload 375
(C) Copper releasing IUDs	(III) Vaults
(D) Hormone releasing IUDs	(IV) Saheli

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Which one of the following is not a cause of loss of biodiversity?

If \(y=3^x+e^x+x^x+x^3\), then the value of \(\frac{d y}{d x}\) at \(x=3\) is:

If the wavelength of light in an experiment on photoelectric effect is increased, then
(A) the photoelectric emissions will not take place
(B) the photoelectric emission may or may not take place
(C) the stopping potential will increase.
(D) the stopping potential will decrease
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The area bounded by \(y^2=4 x\) and its latus rectum and \(x\)-axis in the first quadrant is:

A 50 cm long air core solenoid has a 2 cm radius and 500 turns. The self-inductance of the solenoid would be (given \(\mu_0=4 \pi \times 10^{-7} \operatorname{Tm} * A^{-1}\) and \(\pi^2=10\) )

Which of the following are NOT correct about "Sinking Fund"?
(A) It does not have any specific purpose.
(B) It can be used in any emergency.
(C) Any amount, any time can be deposited in it.
(D) It is set up for a particular upcoming expense.
Choose the correct answer from the options given below:

20 g of binary electrolyte (Molecular mass = 100) are dissolved in 500 g of water. The freezing point of the solution is -0.74°C and \(K_f \) is 1.86 K kg mol⁻¹. The degree of ionisation of the electrolyte is: