The decomposition rate is slower if detritus is rich in-

Read the following passage carefully and answer the given questions.
Plasmodium, a tiny protozoan is responsible for the disease malaria. Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium falciparum is the most serious one and can even be fatal. Innate immunity consist of four types of barriers. These are – (i) Physical barriers- skin on our body is the main barrier which prevents entry of the micro-organisms. (ii) Physiological barriers- Acid in the stomach, saliva in the mouth, tears from eyes-all prevent microbial growth. (iii) Cellular barriers- Certain types of leukocytes (WBC) of our body like polymorpho-nuclear leukocytes (PMNL-neutrophils) and monocytes and natural killer (type of lymphocytes) in the blood as well as macrophages in tissues can phagocytose and destroy microbes. (iv) Cytokine barriers- virus-infected cells secrete proteins called interferons which protect non-infected cells from further viral infection. Allergy is due to the release of chemicals like histamine and serotonin from the mast cells. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Drugs like barbiturates, amphetamines, benzodiazepines, and other similar drugs, that are normally used as medicines to help patients cope with mental illnesses like depression and insomnia, are often abused.
Which one of the followings is not the example of cellular barrier?

Match List-l with List-ll

List-l (Microbes)	List-II (Products or uses)
(A). Trichoderma polysporum	(I). Blood cholesterol lowering agent
(B). Streptococcus	(II). Citric acid
(C). Aspergillus niger	(III). Clot buster to remove blood clots
(D). Monascus purpureus	(IV). Cyclosporin A

Choose the correct answer from the options given below:

The density of a population in a given habitat during a given period, fluctuates due to changes in -
(A) Natality
(B) Immigration
(C) Emigration
(D) Mortality
Choose the correct answer from the options given below:

Read the given passage and answer the question.
ABO blood groups in human beings are controlled by the gene I. The plasma membrane of the red blood cells has sugar polymers that protrude from its surfaces and the kind of sugar is controlled by the gene. The gene (I) has three alleles IA, IB and I. The alleles IA and IB produce a slightly different form of the sugar while allele i does not produce any sugar. Because humans are diploid organisms, each person possesses any two of the three I gene alleles, IA and IB are completely dominant over I.
Blood group 'AB' is an example of :

Match List-I with List-II

List-I (Terms)	List-II (Explanation)
(A) Secondary productivity	(I) The amount of biomass or organic matter produced per unit area over a time period by plants
(B) Net primary productivity	(II) The rate of formation of new organic matter by consumers
(C) Gross primary productivity	(III) The available biomass for the consumption to heterotrophs (herbiviores and decomposers)
(D) Primary production	(IV) The rate of production of organic matter during  photosynthesis

Choose the correct answer from the options given below:

Which one of the following is a correct statement about dormancy?

Aspartame is most successful artificial sweetener but is only limited to cold food and cold drinks because:

How many episodes of mass extinctions of species have occurred on earth since the origin and diversification of life?

Out of all isomers of \(\text{C}_4\text{H}_{11}\text{N}\), how many are primary amines?

Sequentially arrange the evolutionary stages of humans from the given options.
(A) Australopithecines
(B) Homo habilis
(C) Dryopithecus
(D) Homo erectus
Choose the correct answer from the options given below:

Heavy water and __________ is one of the substance used as moderator in reactors.

Question 4 (IUPAC Name of Freon 12):
The correct IUPAC name of Freon 12 is