MCQOPTIONS
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MCQOPTIONS
This section includes 5751 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 2901. |
which type of food chain is represented by following example ?Dead animals insect seavenger Frog Snake |
| A. | Grazzing food chain |
| B. | Detritivorous food chain |
| C. | Decomposer food chain |
| D. | Predators food chain. |
| Answer» C. Decomposer food chain | |
| 2902. |
X is maintained by man, but it is harmful to y ,the x and y are (?) X Y |
| A. | Natural eco-system - Man made ecosystem |
| B. | Man made ecosystem - Natural eco-system |
| C. | Any one from a & b |
| D. | Noun of these |
| Answer» C. Any one from a & b | |
| 2903. |
What is the effect of air pollution on living organisms? |
| A. | Reduce growth and yield of crops |
| B. | Cause premature death of plants |
| C. | Premature leaf fall |
| D. | Both A and B |
| Answer» E. | |
| 2904. |
Pollution is any undesirable change in physical, chemical and biological characteristics of. |
| A. | Land |
| B. | Soil |
| C. | Air and Water |
| D. | All of these |
| Answer» E. | |
| 2905. |
X is included in environmental factors; y is included in ediphic ( soil related) then the x & y is.... X Y |
| A. | Air Water |
| B. | Water Air |
| C. | Soil Light |
| D. | Wind Air |
| Answer» E. | |
| 2906. |
Which one is the maximum suitable to from top of the energy pyraimd ? |
| A. | Therdary consumer |
| B. | Secondary consumer |
| C. | Producers |
| D. | None of this |
| Answer» B. Secondary consumer | |
| 2907. |
Which component are basic in maintaing body processes? |
| A. | Carbohydrate |
| B. | Water |
| C. | Energy |
| D. | All of this |
| Answer» E. | |
| 2908. |
Which is the main cause of atmospheric pollution in major cities? |
| A. | Industrialization |
| B. | Noise |
| C. | Automobiles |
| D. | Dust particles and SPM |
| Answer» D. Dust particles and SPM | |
| 2909. |
99% of SPM in the exhaust of thermal power plant can be separated by.. . |
| A. | Electrostatic precipitator |
| B. | Solvents |
| C. | Scrubber |
| D. | Chimney |
| Answer» E. | |
| 2910. |
When organism of aquatic ecosystem is at equvalent trophee level in when cow is included ?(DUMET...2009) |
| A. | Zooplankton |
| B. | Phytoplakton |
| C. | Nekton |
| D. | Benthos |
| Answer» B. Phytoplakton | |
| 2911. |
Which of the follows is an in complent Ecosystem ? (WBJEE 2008) |
| A. | Grass land |
| B. | Cave |
| C. | River |
| D. | Wet land |
| Answer» C. River | |
| 2912. |
Which type of damage can be caused by Particulate matter of 2.5 micrometer or less in diameter to human health? |
| A. | Breathing and respiratory symptom |
| B. | Inflammation and damage to lungs |
| C. | Premature death of an individual |
| D. | All of these |
| Answer» E. | |
| 2913. |
It 1 lac living organisms are included in third throphie lavel than what would be the number of producers ? |
| A. | 10 lac |
| B. | 10 thousand |
| C. | 1 thousand |
| D. | 1crore (millian) |
| Answer» E. | |
| 2914. |
What is mycorhizer ? |
| A. | Root + Fungi = Symbioti |
| B. | Root+ bacteria = Symbiotic |
| C. | fungi +Root = Parasitism |
| D. | Fungi +leaf = Parasitism |
| Answer» B. Root+ bacteria = Symbiotic | |
| 2915. |
What is correct for human ? |
| A. | Herbivore |
| B. | Carnivore |
| C. | Autotrophs |
| D. | Omnivores |
| Answer» E. | |
| 2916. |
what is correct for the artificial ecosystem ? |
| A. | Biodiversity is less |
| B. | Biodiversity is High |
| C. | Ecosystem is can not be form by human |
| D. | It is more stable than Netural ecosystem |
| Answer» B. Biodiversity is High | |
| 2917. |
Which gas is responsible for increase in atmospheric temperature? |
| A. | O2 |
| B. | CO2 |
| C. | SO2 |
| D. | CO |
| Answer» C. SO2 | |
| 2918. |
The biological amplification of DDT in various tropic levels is known as |
| A. | Eutrophication |
| B. | Global warming |
| C. | Biological bloom |
| D. | Biological magnification |
| Answer» E. | |
| 2919. |
BOD of a river was found to be very low, this means the water |
| A. | Was clean |
| B. | Was polluted |
| C. | Contains algae |
| D. | Contains other dissolved minerals |
| Answer» B. Was polluted | |
| 2920. |
Deforestation results in |
| A. | Change in climatic condition |
| B. | Reduce rain fall |
| C. | Loss of biodiversity |
| D. | All of these |
| Answer» E. | |
| 2921. |
Chipko movement is associated with prevention of |
| A. | Air pollution |
| B. | Cutting of trees |
| C. | River pollution |
| D. | Construction of dams |
| Answer» C. River pollution | |
| 2922. |
More pollution loads in lake, no self purification because. |
| A. | There is no O2 to sustain microbial activity |
| B. | No sunlight available |
| C. | Microbes die |
| D. | Pollutants settles down at the bottom |
| Answer» B. No sunlight available | |
| 2923. |
Which chemicals increase growth of aquatic organism? |
| A. | Nitrogen and phosphoru |
| B. | Calcium and iron |
| C. | Nitrogen and calcium |
| D. | Nitrogen and iron |
| Answer» B. Calcium and iron | |
| 2924. |
Warmth on the surface of the earth is due to |
| A. | Solar radiation |
| B. | Green house effect |
| C. | Geothermal energy |
| D. | All above |
| Answer» C. Geothermal energy | |
| 2925. |
Ultraviolet radiation from sunlight causes a reaction that produces |
| A. | Fluoride |
| B. | CO |
| C. | SO2 |
| D. | Ozone |
| Answer» E. | |
| 2926. |
Arrange the following statements with reference to accelerated eutrophication in proper manner._ans_key_(p)Silt and debris pile up at the bottom of the lake_ans_key_(q)Marsh plants take roots in the shallows begin to fill the lake basin_ans_key_(r)Introduction of large number of nitrogen and phosphate in the pond_ans_key_(s)Encouragement of growth of aquatic organisms. |
| A. | p,q,r,s, |
| B. | r,s,q,p |
| C. | r,s,p,q |
| D. | s,r,p,q |
| Answer» D. s,r,p,q | |
| 2927. |
Increase in the concentration of a nonbiodegradable substance of various tropic level is called |
| A. | Eutrophication |
| B. | Global warming |
| C. | Biological bloom |
| D. | Biological magnification |
| Answer» E. | |
| 2928. |
Thinning of eggshell and their premature breaking is due to |
| A. | Eutrophication |
| B. | Global warming |
| C. | Green house effect |
| D. | Biological magnification |
| Answer» E. | |
| 2929. |
Recycling of e-waste is done in developing countries like… |
| A. | China, India, Pakistan |
| B. | India, Pakistan Shrilanka |
| C. | China, Pakistan, Bangaladesh |
| D. | China, India, Shrilanka |
| Answer» B. India, Pakistan Shrilanka | |
| 2930. |
In which cities Ecosan toilets are working? |
| A. | Kerala and Srilanka |
| B. | Shrinagar and Kerala |
| C. | Kullu and Srilanka |
| D. | Tamilnadu and Kerala |
| Answer» B. Shrinagar and Kerala | |
| 2931. |
Aging of lake is accelerated by |
| A. | Cultural Eutrophication |
| B. | Biological magnification |
| C. | Biological accumulation |
| D. | Algal bloom |
| Answer» B. Biological magnification | |
| 2932. |
The population of eagles and hawks is declining because of, |
| A. | Food scarcity |
| B. | game lovers |
| C. | Harmful effects of pesticides |
| D. | Very few dead animals are found in fields |
| Answer» D. Very few dead animals are found in fields | |
| 2933. |
With the help of Electrostatic precipitators how much particulate pollutants can be removed? |
| A. | 50% |
| B. | 99% |
| C. | 40% |
| D. | 100% |
| Answer» C. 40% | |
| 2934. |
Name the metals recovered during recycling process of e-waste. |
| A. | Gold, Nickle, Copper, Silicon |
| B. | Gold, Copper, Silver, Magnecium |
| C. | Gold, Silver, Copper, Selenium |
| D. | Nickle, Copper, Silicon Silver |
| Answer» B. Gold, Copper, Silver, Magnecium | |
| 2935. |
Enrichment of a water body with organic waste results in sudden algal bloom. This phenomenon is known as |
| A. | Eutrophication |
| B. | Aqua bloom |
| C. | Biological bloom |
| D. | Biological magnification |
| Answer» B. Aqua bloom | |
| 2936. |
If there was no CO2 in the earth’s atmosphere, the temperature of earth’s surface would be. CBSE1995 |
| A. | Dependent on amount of O2 in the atmosphere |
| B. | Higher than present |
| C. | Less than present |
| D. | The same |
| Answer» D. The same | |
| 2937. |
Jhum refers to. |
| A. | Crop Cultivation |
| B. | Social forestry |
| C. | Shifting cultivation |
| D. | Large scale agriculture |
| Answer» D. Large scale agriculture | |
| 2938. |
The utilization of elements and compounds in nature generation theory because ______. |
| A. | life cycle |
| B. | cyclic pathway |
| C. | material cycles |
| D. | recycling |
| Answer» D. recycling | |
| 2939. |
Noise was recognized as air pollutant through amendment of |
| A. | Environment act |
| B. | the air act |
| C. | Noise act |
| D. | All of above |
| Answer» B. the air act | |
| 2940. |
Which of the following is the most fit in an evolutionary sense? |
| A. | A lion who is successful at capturing prey but has no cubs. |
| B. | A lion who has many cubs, eight of which live to adulthood. |
| C. | A lion who overcomes a disease and lives to have three cubs. |
| D. | A lion who cares for his cubs, two of who live to adulthood. |
| Answer» C. A lion who overcomes a disease and lives to have three cubs. | |
| 2941. |
BOD is related to |
| A. | Detergent |
| B. | Inorganic pollutants |
| C. | Organic pollutants |
| D. | Organophosphorus |
| Answer» D. Organophosphorus | |
| 2942. |
The stage for the evolution of autotrophs was set with the evolution of ______. |
| A. | RNA |
| B. | DNA |
| C. | ozone |
| D. | chlorophyll |
| Answer» E. | |
| 2943. |
CFC’s splits up in stratosphere to release chlorine by the action of.. |
| A. | UVA |
| B. | UVB |
| C. | UVC |
| D. | All of these |
| Answer» C. UVC | |
| 2944. |
The sequence of origin of life may be considered as ______. |
| A. | Amino acid Protein Chlorophyll |
| B. | Chlorophyll Starch Glycogen |
| C. | Nucleic acid Amino acid Chlorophyll |
| D. | Chlorophyll Nucleic acid Amino acid |
| Answer» D. Chlorophyll Nucleic acid Amino acid | |
| 2945. |
A biologist is trying to infer how five closely related species of snakes are related to one another. She notices that some of the snakes have forked tongues and others do not. Which of the following would help her distinguish the ancestral state? |
| A. | She looks among snake fossils for evidence that being forked is a characteristic of the ancestor of this group, but determines no such fossils exist. |
| B. | She locates a specimen of a more distantly related snake to see if it has a forked tongue. |
| C. | She looks at a representative mammal species to see if it has a forked tongue. |
| D. | She flips a coin. |
| Answer» C. She looks at a representative mammal species to see if it has a forked tongue. | |
| 2946. |
The first formed organism (riboorganism) used only ................. for catalyzing reactions. |
| A. | DNA |
| B. | amino acids |
| C. | fatty acids |
| D. | RNA |
| Answer» E. | |
| 2947. |
How might an evolutionary biologist explain why a species of species of salamander becomes blind after colonizing a cave? |
| A. | It is possible that in the cave there is a source of pollution that increases the mutation rate for a gene that makes salamanders blind. Over time, due to exposure to this chemical, the members of the population lose their sight. |
| B. | Members of the ancestral population that colonized the cave differed in their ability to see. If maintaining the ability to see in the cave was a waste of energy, blind salamanders might actually have more offspring than those who could see. |
| C. | There is no way to explain this in terms of natural selection |
| D. | The members of this salamander species no longer needed to use their eyes. Over time, due to |
| Answer» C. There is no way to explain this in terms of natural selection | |
| 2948. |
The determine which molecules might have formed spontaneously on early earth, Stanley Miller used an apparatus with an atmosphere containing ______. |
| A. | oxygen, hydrogen and nitrogen |
| B. | oxygen, hydrogen, ammonia and water vapour |
| C. | oxygen, hydrogen and methane |
| D. | hydrogen, ammonia, methane and water vapour |
| Answer» E. | |
| 2949. |
Why is similarity misleading when it comes to inferring evolutionary relationships? |
| A. | Organisms that look alike may be very distantly related to one another. |
| B. | Similarities between two species may be due to common descent, without indicating how closely the two are related to one another. |
| C. | A and B only. |
| D. | The presence of a shared derived character state is often misleading when it comes to inferring relationships between species . |
| Answer» D. The presence of a shared derived character state is often misleading when it comes to inferring relationships between species . | |
| 2950. |
Which of the following must increase over geological time according to evolutionary biologists? |
| A. | Size . |
| B. | Complexity . |
| C. | Speed of evolutionary processes such as mutation. |
| D. | All of the above. |
| Answer» E. | |