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MCQOPTIONS
This section includes 2637 Mcqs, each offering curated multiple-choice questions to sharpen your 7th Class knowledge and support exam preparation. Choose a topic below to get started.
| 801. |
Plants mainly absorb water and minerals from: |
| A. | R - horizon |
| B. | A - horizon |
| C. | B - horizon |
| D. | C - horizon |
| E. | None of these |
| Answer» C. B - horizon | |
| 802. |
Soil containing smallest rock particles is: |
| A. | Silt |
| B. | Sand |
| C. | Gravel |
| D. | Clay |
| E. | None of these |
| Answer» E. None of these | |
| 803. |
In digester tank which one of the following is present? |
| A. | Aerobic bacteria |
| B. | Anaerobic bacteria |
| C. | Red worms |
| D. | Both [a] and [b] |
| E. | None of these |
| Answer» B. Anaerobic bacteria | |
| 804. |
Which of the following is not required for the weathering of rocks? |
| A. | Wind |
| B. | Sun's heat |
| C. | Ploughing |
| D. | Rain |
| E. | None of these |
| Answer» D. Rain | |
| 805. |
Which of the following is prepared from the wood obtained from forest? |
| A. | Paper |
| B. | Matchsticks |
| C. | Plywood |
| D. | All the above |
| E. | None of these |
| Answer» E. None of these | |
| 806. |
Highest layer of vegetation in a forest: |
| A. | Understorey |
| B. | Canopy |
| C. | Herb layer |
| D. | Shrub layer |
| E. | None of these |
| Answer» C. Herb layer | |
| 807. |
Which one of the following is an organic impurity present in sewage? |
| A. | Nitrates |
| B. | Metals |
| C. | Urea |
| D. | Phosphates |
| E. | None of these |
| Answer» D. Phosphates | |
| 808. |
World water day is celeberated on: |
| A. | 22 June |
| B. | 44277 |
| C. | 22 Dec |
| D. | 5 June |
| E. | None of these |
| Answer» C. 22 Dec | |
| 809. |
Which of the following functions is not performed by earthworms in the soil? |
| A. | Loosening the soil. |
| B. | Improving the soil quality. |
| C. | Irrigating the soil. |
| D. | Enriching the soil by nutrients. |
| E. | None of these |
| Answer» D. Enriching the soil by nutrients. | |
| 810. |
Which of the following is not a process of cleaning water? |
| A. | Filtration |
| B. | Decantation |
| C. | Infiltration |
| D. | Chlorination |
| E. | None of these |
| Answer» D. Chlorination | |
| 811. |
The forests which are commonly known as orchard of the world?. |
| A. | Temperate deciduous forests. |
| B. | Temperate evergreen forests. |
| C. | Mediterranean forests. |
| D. | All the above |
| E. | None of these |
| Answer» D. All the above | |
| 812. |
Branchy part of a tree above the stem is known as: |
| A. | Shrub |
| B. | Herb |
| C. | Crown |
| D. | Floor |
| E. | None of these |
| Answer» D. Floor | |
| 813. |
In biology, a relation between two organisms in which one organism is benefited and the other is usually harmed is called: |
| A. | Mutualism |
| B. | Commensalism |
| C. | Parasitism |
| D. | Groupism |
| E. | None of these |
| Answer» D. Groupism | |
| 814. |
Which plant is shown in the given figure? |
| A. | Venus flytrap plant |
| B. | Pitcher plant |
| C. | Sundew plant |
| D. | Cuscuta plant |
| E. | None of these |
| Answer» C. Sundew plant | |
| 815. |
Simple carbohydrate produced as a product of photosynthesis by green plants is: |
| A. | Starch |
| B. | Glucose |
| C. | Sucrose |
| D. | Lactose |
| E. | None of these |
| Answer» C. Sucrose | |
| 816. |
Which of the following statements is correct? (i) The large intestine is longer and wider than the small intestine in human beings. (ii) Every tooth is held in a separate socket in the jaw. (iii) Mucus protects the stomach from its own secretions of hydrochloric acid. (iv) Proteins get break down to form fatty acids. |
| A. | (i) and (ii) |
| B. | (ii) and (iv) |
| C. | (ii) and (iii) |
| D. | (i) and (iv) |
| E. | None of these |
| Answer» D. (i) and (iv) | |
| 817. |
In human beings Cellulose can be taken as roughage in diet because: |
| A. | It can be properly digested by our body. |
| B. | Digestive juices will convert it into glucose. |
| C. | It helps in proper functioning of digestive system. |
| D. | All the above |
| E. | None of these |
| Answer» D. All the above | |
| 818. |
Partially digested food in the rumen of a goat is called: |
| A. | Starch |
| B. | Cellulose |
| C. | Curd |
| D. | Cud |
| E. | None of these |
| Answer» E. None of these | |
| 819. |
Bile helps in breakdown of : |
| A. | Carbohydrates |
| B. | Proteins |
| C. | Fats |
| D. | Vitamins |
| E. | None of these |
| Answer» D. Vitamins | |
| 820. |
Largest gland in human body is: |
| A. | Liver |
| B. | Pancreas |
| C. | Salivary gland |
| D. | Oesophagus |
| E. | None of these |
| Answer» B. Pancreas | |
| 821. |
The process in which absorbed food is taken in by body cells: |
| A. | Absorption |
| B. | Digestion |
| C. | Assimilation |
| D. | Egestion |
| E. | None of these |
| Answer» D. Egestion | |
| 822. |
Which of the following is not a correct match? |
| A. | Incisors - Chisel shaped teeth |
| B. | Canines - Pointed teeth |
| C. | Premolars - Very small teeth |
| D. | Molars - Very large teeth |
| E. | None of these |
| Answer» D. Molars - Very large teeth | |
| 823. |
Mutually beneficial relationship between Cynobacterium and a fungus is known as: |
| A. | Probiotic |
| B. | Symbiosis |
| C. | Photosynthetic |
| D. | Biogenesis |
| E. | None of these |
| Answer» C. Photosynthetic | |
| 824. |
Which of the following glands is located just below the stomach? |
| A. | Liver |
| B. | Gall bladder |
| C. | Pancreas |
| D. | Rectum |
| E. | None of these |
| Answer» D. Rectum | |
| 825. |
___ secretes bile which is temporarily stored is in a sac called: |
| A. | Pancreas, stomach |
| B. | Liver, stomach |
| C. | Liver, Gall bladder |
| D. | Small intestine, Gall bladder |
| E. | None of these |
| Answer» D. Small intestine, Gall bladder | |
| 826. |
On treating starch with saliva it gets break-down to form: |
| A. | Maltose |
| B. | Fatty acid |
| C. | Sucrose |
| D. | Ammo acid |
| E. | None of these |
| Answer» B. Fatty acid | |
| 827. |
Water is absorbed from the undigested food material in: |
| A. | Small intestine |
| B. | Large intestine |
| C. | Liver |
| D. | Rectum |
| E. | None of these |
| Answer» C. Liver | |
| 828. |
A Housefly uses ___ to convert solid food into liquid. |
| A. | Wings |
| B. | Saliva |
| C. | Water |
| D. | Filth |
| E. | None of these |
| Answer» C. Water | |
| 829. |
Hard Shell of shellfish is made up of : |
| A. | Sulphur |
| B. | Calcium carbonate |
| C. | Magnesium oxide |
| D. | Phosphorus |
| E. | None of these |
| Answer» C. Magnesium oxide | |
| 830. |
Which of the following uses long tube to feed itself? |
| A. | Frog |
| B. | Lizard |
| C. | Butterfly |
| D. | Snake |
| E. | None of these |
| Answer» D. Snake | |
| 831. |
Which of the following statements is correct? (i) Parasitic nutrition is a heterotrophic nutrition. (ii) Saprophytic plants cannot grow without the host plant. (iii) Insectivorous plants do not perform photosynthesis at all. (iv) Insectivorous plants obtain nutrients from insects. |
| A. | (i) and (ii) |
| B. | (ii) and (iii) |
| C. | (i) and (iii) |
| D. | (i) and (iv) |
| E. | None of these |
| Answer» E. None of these | |
| 832. |
Which of the following statements is correct? Statement 1: In symbiosis only fungus is benefited from alga. Statement 2: In symbiosis only alga is benefited from fungus. |
| A. | Statement 1 is correct and statement 1 is incorrect. |
| B. | Statement 2 is correct and statement 1 is incorrect. |
| C. | Both the statements 1 and 2 are correct. |
| D. | Both the statements 1 and 2 are incorrect. |
| E. | None of these |
| Answer» E. None of these | |
| 833. |
Insectivorous plants trap insects because they: |
| A. | Do not contain chlorophyll. |
| B. | Do not perform photosynthesis. |
| C. | Grows in soil which do not contains sufficient nitrogen. |
| D. | Have different type of digestive system. |
| E. | None of these |
| Answer» D. Have different type of digestive system. | |
| 834. |
Which of the following is not a symbiotic relationship? |
| A. | Algae and Fungus |
| B. | Rhizobium and Pea plant |
| C. | Dodder and its host |
| D. | All the above |
| E. | None of these |
| Answer» D. All the above | |
| 835. |
Shape of guard cells is : |
| A. | Irregular shape |
| B. | Cylindrical shape |
| C. | Kidney shape |
| D. | Triangular shape |
| E. | None of these |
| Answer» D. Triangular shape | |
| 836. |
Mould is a/an: |
| A. | Autotroph |
| B. | Saprophyte |
| C. | Partial parasite |
| D. | Parasite |
| E. | None of these |
| Answer» C. Partial parasite | |
| 837. |
Which among the following does not depend on the other plants for their growth? |
| A. | Cuscuta plant |
| B. | Mistletoe plant |
| C. | Corn smut |
| D. | Pitcher plant |
| E. | None of these |
| Answer» E. None of these | |
| 838. |
Fill in the blanks with a correct combination of words. (i) is an autotroph, (ii) is a saprophyte, live together in (iii). The fungus supplies (iv) to the alga. The alga supplies (v) to the fungus. |
| A. | (i) - Fungus, (ii) - alga, (iii) - lichen, (iv) - water and minerals, (v) - food |
| B. | (i) - Alga, (ii) - fungus, (iii) - lichen, (iv) - food, (v) - water and minerals |
| C. | (i) - Alga, (ii) - fungus, (iii) - lichen, (iv) - water and minerals, (v) - food |
| D. | (i) - Fungus, (ii) - Alga, (iii) - lichen, (iv) - food, (v) - water and minerals |
| E. | None of these |
| Answer» D. (i) - Fungus, (ii) - Alga, (iii) - lichen, (iv) - food, (v) - water and minerals | |
| 839. |
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 1 The organisms called Fungi secrete digestive juices on dead and decaying matter and convert it into solution. Then they absorb the nutrients from it. Fungal spores are generally present in air. When they land on wet and warm things they germinate and grow. What is the mode of nutrition in this plant? |
| A. | Insectivorous |
| B. | Parasitic |
| C. | Saprophytic |
| D. | autotrophic |
| Answer» D. autotrophic | |
| 840. |
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 1 The organisms called Fungi secrete digestive juices on dead and decaying matter and convert it into solution. Then they absorb the nutrients from it. Fungal spores are generally present in air. When they land on wet and warm things they germinate and grow. Fungi |
| A. | secrete digestive juices on dead and decaying matter. |
| B. | absorb nutrients in solution form from dead and decaying matter. |
| C. | the mode of nutrition of fungi is called saprotrophic nutrition. |
| D. | All the above are correct |
| Answer» E. | |
| 841. |
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 1 The organisms called Fungi secrete digestive juices on dead and decaying matter and convert it into solution. Then they absorb the nutrients from it. Fungal spores are generally present in air. When they land on wet and warm things they germinate and grow. Fungi can grow |
| A. | on a moistened piece of bread left in a warm place for 2-3 days. |
| B. | on pickles, leather, clothes that are left in hot and humid weather for 2-3 days. |
| C. | both are correct |
| D. | none of the above is correct |
| Answer» D. none of the above is correct | |
| 842. |
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 1 The organisms called Fungi secrete digestive juices on dead and decaying matter and convert it into solution. Then they absorb the nutrients from it. Fungal spores are generally present in air. When they land on wet and warm things they germinate and grow. The mode of nutrition adopted by Fungi is called |
| A. | autotrophic |
| B. | heterotrophic |
| C. | saprotrophic |
| D. | none of these |
| Answer» D. none of these | |
| 843. |
DIRECTIONS: Match column I with column II and select the correct answers using the code given below the columns Column - I Column - II (A) Green colour of algae (p) Cuscuta (B) Have no chlorophyll (q) Chlorophyll (C) Fungi (r) Spoils many things during rainy seasons (D) Peas (s) Leguminous plant |
| A. | (A) \[\to \] (p), (B) \[\to \] (q), (C) \[\to \] (r), (D) \[\to \] (s) |
| B. | (A) \[\to \] (q), (B) \[\to \] (p), (C) \[\to \] (s), (D) \[\to \] (r) |
| C. | (A) \[\to \] (s), (B) \[\to \] (r), (C) \[\to \] (q), (D) \[\to \] (p) |
| D. | (A) \[\to \] (q), (B) \[\to \] (p), (C) \[\to \] (r), (D) \[\to \] (s) |
| Answer» E. | |
| 844. |
DIRECTIONS: Match column I with column II and select the correct answers using the code given below the columns Column - I Column - II (A) Neottia (p) Total parasite (B) Dionea (q) Saprophyte (C) Amarbel (r) Partial parasite (D) Loran thus (s) Insectivore |
| A. | (A) \[\to \] (r), (B) \[\to \] (s), (C) \[\to \] (p), (D) \[\to \] (q) |
| B. | (A) \[\to \] (q), (B) \[\to \] (s), (C) \[\to \] (p), (D) \[\to \] (r) |
| C. | (A) \[\to \] (s), (B) \[\to \] (p), (C) \[\to \] (q), (D) \[\to \] (r) |
| D. | (A) \[\to \] (r), (B) \[\to \] (q), (C) \[\to \] (p), (D) \[\to \] (s) |
| Answer» C. (A) \[\to \] (s), (B) \[\to \] (p), (C) \[\to \] (q), (D) \[\to \] (r) | |
| 845. |
Why is it said that life would be impossible on earth in the absence of photosynthesis? |
| A. | In the absence of photosynthesis, there would be no food available for us. |
| B. | Solar energy is the ultimate source of energy. |
| C. | Solar energy is essential for photosynthesis |
| D. | None of the above is correct |
| Answer» B. Solar energy is the ultimate source of energy. | |
| 846. |
The organisms, which obtain nutrition from dead and decaying organic matter are called? |
| A. | Saprophytes |
| B. | Parasites |
| C. | Host |
| D. | None of these |
| Answer» B. Parasites | |
| 847. |
What is the role of the bacteria in leguminous plants? |
| A. | Convert oxides of nitrogen into soil nitrates. |
| B. | Convert atmospheric nitrogen gas into soil nitrates. |
| C. | Convert soil nitrates into gaseous nitrogen. |
| D. | Convert plant proteins into ammonia. |
| Answer» C. Convert soil nitrates into gaseous nitrogen. | |
| 848. |
In which of the following processes is oxygen liberated? |
| A. | Combustion |
| B. | Photosynthesis |
| C. | Respiration |
| D. | Evaporation |
| Answer» C. Respiration | |
| 849. |
Which of the following can be proved experimentally? |
| A. | Light is necessary for photosynthesis |
| B. | Chlorophyll is necessary for photo synthesis |
| C. | Carbon dioxide is necessary for photosynthesis |
| D. | All the can be proved experimentally |
| Answer» E. | |
| 850. |
The bacterium Rhizobium helps the crops to get nitrogen. Select the statement that is incorrect about Rhizobium. |
| A. | Rhizobium converts atmospheric nitrogen into a soluble form that the plants can absorb. |
| B. | Rhizobium can make its own food. |
| C. | Rhizobium lives in the roots of leguminous plants such as gram, peas and moong. |
| D. | Leguminous plants provide food and shelter to Rhizobium. |
| Answer» C. Rhizobium lives in the roots of leguminous plants such as gram, peas and moong. | |