1. Which among the following fishes does not have Central Nervous System?
[A] Dog Fish
[B] Cuttle Fish
[C] Jelly Fish
[D] Star Fish
Show Answer
Correct Answer: C [Jelly Fish]
Notes:
Jellyfish and sea jellies are the informal common names given to the medusa-phase of certain gelatinous members of the sub-phylum Medusozoa. Jellyfish do not have specialized systems for osmoregulation, respiration and circulation, and do not have a central nervous system.
2. In peaches, cherries, plums, and apricots the edible parts are ?
[A] endocarp
[B] mesocarp
[C] exocarp
[D] none of the above
Show Answer
Correct Answer: B [mesocarp]
Notes:
In peaches, cherries, plums, and apricots, the edible parts are the mesocarp, which refers to the fleshy part of the fruit that surrounds the endocarp. The endocarp, also known as the stone or pit, is the hard, woody layer that encases the seed of the fruit. While the endocarp is not typically edible, the mesocarp is the part of the fruit that is commonly consumed as food.
3. Which among the following is correct definition of Bacteriophage?
[A] A Bacteria that destroys Virus
[B] A Virus that destroys Bacteria
[C] A Bacteria that destroys another bacteria
[D] A Bacteria that destroys Fungi
Show Answer
Correct Answer: B [A Virus that destroys Bacteria]
Notes:
Bacteriophage a virus that parasitizes a bacterium by infecting it and reproducing inside it. Bacteriophages are commonly used in genetic research. They are composed of proteins that encapsulate a DNA or RNA genome, and may have structures that are either simple or elaborate.
4. The colonization of an area that has not been previously occupied by an ecological community is called:
[A] primary succession
[B] secondary succession
[C] tertiary succession
[D] cyclic succession
Show Answer
Correct Answer: A [ primary succession]
Notes:
The colonization of an area that has not been previously occupied by an ecological community is called primary succession. Examples are: newly exposed rock or sand surfaces, lava flows, newly exposed glacial tills, etc.
5. Which of the following is the correct definition of the Primary Productivity?
[A] Rate of photosynthesis in plants and photosynthetic bacteria as compared to the rate of plant consumption by herbivores
[B] Total amount of light energy converted to organic compounds in a given area per unit time.
[C] Rate of decomposition by the detritivores.
[D] Total biomass of the photosynthetic organisms in the ecosystem.
Show Answer
Correct Answer: B [ Total amount of light energy converted to organic compounds in a given area per unit time.]
Notes:
B is the correct answer.
6. Which of the following is the most common wheat disease in India?
[A] Green ear
[B] Smut
[C] Loose smut
[D] Rust
Show Answer
Correct Answer: D [Rust]
Notes:
Wheat leaf rust is a fungal disease that affects wheat, barley and rye stems, leaves and grains. Its infections can lead up to 20% yield loss, which is exacerbated by dying leaves, which fertilize the fungus. The pathogen of rust is Puccinia rust fungus.
7. Which one of the following is cultivated by transplanting seedlings?
[A] Maize
[B] Sorghum
[C] Onion
[D] Soyabean
Show Answer
Correct Answer: C [Onion]
Notes:
Onions can be grown from seeds, seedlings and bulblets. Proper nursery management and transplanting are important operations in the onion crop. About 0.05 hectare nursery bed area is enough for getting seedlings to transplant in one hectare.
8. In a bisexual flower, if androecium and gynaecium mature at different times, what is the name given to the phenomenon?
[A] Dichogamy
[B] Herkogamy
[C] Heterogamy
[D] Monogamy
Show Answer
Correct Answer: A [Dichogamy]
Notes:
Dichogamy The condition in which the male and female reproductive organs of a flower mature at different times, thereby ensuring that self-fertilization does not occur.
9. In photosynthesis, light energy is converted into which form of energy?
[A] Electrical energy
[B] Kinetic energy
[C] Chemical energy
[D] Potential energy
Show Answer
Correct Answer: C [Chemical energy]
Notes:
In the process of photosynthesis, the energy from solar light is converted into the chemical energy.
10. The main components of biogas are
[A] Methane and Sulphur di-oxide
[B] Methane, Hydrogen and Nitric oxide
[C] Methane and Nitric oxide
[D] Methane and Carbon di-oxide
Show Answer
Correct Answer: D [Methane and Carbon di-oxide]
Notes:
Biogas comprises of CH4, CO2 and small amounts of H2S.
