Monday, December 30, 2019

Monday, March 11, 2019

Neural control and coordination: Previous Year Questions Part 2

NEURAL CONTROL AND COORDINATION

2013 MARCH
1.     Arrange the following processes in nerve impulse conduction in a sequential order. (3)

Neural control and coordination: Previous Year Questions Part 3

NEURAL CONTROL AND COORDINATION

MARCH 2016
1.     Observe the diagram carefully and answer the following questions.                                                                  (3)

Chemical coordination and integration: Previous Year Questions Part 2

CHEMICAL COORDINATION AND INTEGRATION

2013 MARCH
1.     Fill the table appropriately. (2)

Chemical coordination and integration: Previous Year Questions Part 3

CHEMICAL COORDINATION AND INTEGRATION

2016  MARCH
1.     Hormonal abnormality is responsible for certain diseases in man. List of some diseases are given below. Write the hormone related to each of it.     (2)

Human Reproduction: Previous Year Questions Part 2

HUMAN REPRODUCTION

2013 MARCH
1.   The following statements compare the process of oogenesis & spermatogenesis. Which one is not true? (1)

Human Reproduction: Previous Year Questions Part 3

HUMAN REPRODUCTION

2016 MARCH
1.   Match the columns A and B: (2)

Reproductive health: Previous Year Questions Part 2

REPRODUCTIVE HEALTH

2013 MARCH
1.     Suggest the ART which may be successful in the following conditions. (½ + ½ + 2=3) 

Reproductive health: Previous Year Questions Part 3

REPRODUCTIVE HEALTH

2016 MARCH
1.     Categorize the given birth control methods into three groups with proper heads.

Principles of inheritance and variation: Previous Year Questions Part 2

PRINCIPLES OF INHERITANCE AND VARIATION

2013 MARCH
1.     Identify the traits from the pedigree chart. Give one example each. (1+1 =2)

Principles of inheritance and variation: Previous Year Questions Part 3

PRINCIPLES OF INHERITANCE AND VARIATION

2016 MARCH
1.     Which of the following is not a Mendelian disorder?

Molecular basis of inheritance: Previous Year Questions Part 2

MOLECULAR BASIS OF INHERITANCE

2013 MARCH
1.     The flow of genetic information is shown below. Name the processes a, b, c & d. (4 x ½ =2)

Molecular basis of inheritance: Previous Year Questions Part 3

MOLECULAR BASIS OF INHERITANCE

2016 MARCH
1.     Result of a famous experiment is given in the figure. Answer the questions.

Evolution: Previous Year Questions Part 2

EVOLUTION

2013 MARCH
1.     Arrange the following examples under two heads viz- homologous organs and analogous organs.            (Score: 2)

Evolution: Previous Year Questions Part 3

EVOLUTION

2016 MARCH
1.     Which theory talks about the huge explosion that leads to origin of universe?                (Score: 1)

Human health n diseases: Previous Year Questions Part 2

HUMAN HEALTH AND DISEASES


2013 MARCH
1.     Most often HIV infection occurs due to conscious behavior patterns. Do you agree with this statement? Substantiate your answer. (2)

Human health n diseases: Previous Year Questions Part 3

HUMAN HEALTH AND DISEASES


2016 MARCH
1.     Identify the disease shown in the following figure and write the causative organism of the disease.           (Score: 1)

Microbes in human welfare: Previous Year Questions Part 2

MICROBES IN HUMAN WELFARE


2013 MARCH
1.     Some bioactive molecules, their source and their medical importance are given in table. Fill up the missing parts. (2)

Microbes in human welfare: Previous Year Questions Part 3

MICROBES IN HUMAN WELFARE


2016 MARCH
1.     “BOD is commonly calculated as an index of water pollution.”

Biodiversity and conservation: Previous Year Questions Part 2

BIODIVERSITY AND CONSERVATION


2012 SAY
1.     Last 20 years alone have witnessed the disappearance of 27 animal species from earth.

Biodiversity and conservation: Previous Year Questions Part 3

BIODIVERSITY AND CONSERVATION


2016   MARCH
1.     Observe the concept diagram of the Evil Quartet of biodiversity loss.

Sunday, March 10, 2019

Environmental issues: Previous Year Questions Part 1


ENVIRONMENTAL ISSUES


2010 MARCH
1.     Destruction of forest leads to the increase of CO2 in atmosphere. Recently Govt. of India instituted an award for individuals or communities from rural areas that shown extraordinary courage and dedication in protecting wildlife.

Environmental issues: Previous Year Questions Part 2

ENVIRONMENTAL ISSUES


2013 MARCH
NO QUESTIONS
2013 SAY
1.     In a study conducted, the concentration of DDT found to increase in the successive trophic levels. The result of the study is shown below.

Environmental issues: Previous Year Questions Part 3

ENVIRONMENTAL ISSUES


2016 MARCH
1.     Increase in the concentration of toxicants at successive trophic level is called

Ecosystems: Previous Year Questions Part 1


ECOSYSTEMS

2010 MARCH
1.     During a study tour teacher showed the primary colonizers on the banks of the river ‘Nila’.

Ecosystems: Previous Year Questions Part 2

ECOSYSTEMS


2013 MARCH
1.     Final community that is in near equilibrium with environment in ecological succession is called (1)

Ecosystems: Previous Year Questions Part 3

ECOSYSTEMS


2016 MARCH
1.     Nutrients are never lost from the ecosystems and are recycled. Write about

Organisms and populations: Previous Year Questions Part 1


ORGANISMS AND POPULATIONS


2010 MARCH
1.     Given below is a table which shows the interspecific interaction. ‘+’ sign indicates beneficial, ‘-‘ sign indicates detrimental and ‘0’ indicates neutral.

Organisms and populations: Previous Year Questions Part 2

ORGANISMS AND POPULATIONS


2013 MARCH
1.     Read the statements below and identify the mode of interaction between the species. (2)

Organisms and populations: Previous Year Questions Part 3

ORGANISMS AND POPULATIONS


2016 MARCH
1.     a) Population interactions may be beneficial or not. Write any three interactions in detail.                            (Scores: 3)

Biotechnology and its Applications: Previous Year Questions Part 1


BIOTECHNOLOGY AND ITS APPLICATIONS


2010 MARCH
1.     Teacher asked Balan to write the principle of RNAi technology. Help him by describing the method. (1)

Biotechnology and its Applications: Previous Year Questions Part 2

BIOTECHNOLOGY AND ITS APPLICATIONS


2013 MARCH
1.     A novel strategy to prevent nematode manifestation is based on ‘RNA interference’.

Biotechnology and its Applications: Previous Year Questions Part 3

BIOTECHNOLOGY AND ITS APPLICATIONS


2016 MARCH
1.     The recombinant DNA technological process has made immense impact in the area of healthcare. How Eli Lilly produced Insulin? (Scores: 2)

Biotechnology-Principles and processes: Previous Year Questions Part 1


BIOTECHNOLOGY- PRINCIPLES AND PROCESSES


2010 MARCH
1.     Raju is searching blight resistant plants for his crossing experiments. Unfortunately no such varieties are available.

Biotechnology-Principles and processes: Previous Year Questions Part 2

BIOTECHNOLOGY- PRINCIPLES AND PROCESSES


2013 MARCH
1.     Jaya read in a Biotechnology book that alien DNA can be introduced into host cell by microinjection and biolistics. Explain these methods. (2)

Biotechnology-Principles and processes: Previous Year Questions Part 3

BIOTECHNOLOGY- PRINCIPLES AND PROCESSES


2016 MARCH
1.   
 

Strategies for enhancement in food production: Previous Year Questions Part 1


STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

2010 MARCH
1.     Johny, a Plus Two student is from a tribal colony with lower level of vitamins, minerals and protein deficiency. He wishes to be a plant breeder to help the public by producing new crops with high levels of vitamins, minerals, protein etc. identify the phenomenon. (2)

Strategies for enhancement in food production: Previous Year Questions Part 2

STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION


2013 MARCH
1.     MOET is a programme for herd improvement. Expand MOET. (1)

Strategies for enhancement in food production: Previous Year Questions Part 3

STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION


2016 MARCH
1.     (a) Resistance is the ability to prevent the pathogen from causing disease.

Sexual reproduction in flowering plants: Previous Year Questions Part 1


SEXUAL REPRODUCTION IN FLOWERING PLANTS


2010 MARCH
1.     Given below in the diagram showing the transfer of pollen grains.

Sexual reproduction in flowering plants: Previous Year Questions Part 2

SEXUAL REPRODUCTION IN FLOWERING PLANTS


2013 MARCH
1.     After syngamy and triple fusion in embryo sac, embryo will be diploid and endosperm will (1)

Sexual reproduction in flowering plants: Previous Year Questions Part 3

SEXUAL REPRODUCTION IN FLOWERING PLANTS


2015 MARCH
1.     (a) Reeja a science student observed the structure of mature embryo sac comprising antipodals, central cells and egg apparatus. Explain each one of them.                                                                                                (Scores: 1+2+1=4)

Reproduction in organisms: Previous Year Questions Part 1


REPRODUCTION IN ORGANISMS

2010 MARCH
1.     Fill up the blanks after reading the statement: (1)
The post fertilization events in angiosperms.

Reproduction in organisms: Previous Year Questions Part 2


2013 MARCH
1.     In honeybees and some lizards female gamete undergoes development to form new organisms without fertilization. This phenomenon is called ………….. (1)

Reproduction in organisms: Previous Year Questions Part 3

REPRODUCTION IN ORGANISMS

2016 MARCH
1.     When a gamete without any fusion develop into a new organism the phenomenon is called
a)     Syngamy                       (b)   External fertilization

Friday, March 8, 2019

Animal Kingdom: Previous Year Questions Part 3

ANIMAL KINGDOM

2016 MARCH
1.     The characteristic features of an invertebrate is given.
“The phylum includes the comb jellies, also called walnuts. They are noted for their bioluminescence and comb plates.” Identify the phylum.                   (1)

Biodiversity and conservation: Previous Year Questions Part 1

BIODIVERSITY AND CONSERVATION



2010 MARCH
1.     Gopalan cultivated a variety of fruit crops and plants in his field and Raman destroyed the fruit crops and plants and cultivated rubber trees which are double in number.