Nutrition in Plants and Animals

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Modes of Nutrition in Plants and Photosynthesis

Subtopic

Modes of Nutrition in Plants and Photosynthesis under Nutrition in Plants and Animals for Grade 7 CBSE.

Preview questions (no answers)

1.
$CO_2$
A. $Stomata$
B. $Vessels$
C. $Root hairs$
D. $Guard cells$
2.
$Look at the flowchart below representing different modes of nutrition. Which term correctly fills the box marked 'X' for organisms that prepare their own food from simple inorganic substances?$
A. $Saprotrophic$
B. $Autotrophic$
C. $Parasitic$
D. $Holozoic$
3.
$Plants require nitrogen to synthesize proteins. Which bacterium lives in the root nodules of leguminous plants and helps convert atmospheric nitrogen into a usable form for the plant?$
A. $Rhizobium$
B. $Lactobacillus$
C. $Yeast$
D. $Amoeba$
4.
$Some organisms, like fungi and mushrooms, grow on dead and decaying matter and derive their nutrients from them. What are these organisms called?$
A. $Autotrophs$
B. $Saprotrophs$
C. $Herbivores$
D. $Parasites$
5.
$While plants primarily synthesize carbohydrates during photosynthesis using carbon, hydrogen, and oxygen, they also need to produce proteins for growth. Which additional element is required for the synthesis of proteins that is not found in carbohydrates?$
A. $Magnesium$
B. $Phosphorus$
C. $Nitrogen$
D. $Iron$
6.
$Study the provided flowchart representing the process of photosynthesis. Identify the two substances produced at the end of this process, represented by the labels X and Y.$
A. $X: Oxygen, Y: Carbohydrate$
B. $X: Carbon dioxide, Y: Water$
C. $X: Sunlight, Y: Chlorophyll$
D. $X: Nitrogen, Y: Protein$
7.
$CO_2$
A. $Chloroplasts$
B. $Guard cells$
C. $Xylem vessels$
D. $Phloem cells$
8.
$Which of the following best describes the difference between a parasite and a saprotroph?$
A. $Parasites are always plants, while saprotrophs are always fungi.$
B. $Parasites derive nutrition from a living host, while saprotrophs derive it from dead organic matter.$
C. $Parasites perform photosynthesis at night, while saprotrophs perform it during the day.$
D. $There is no difference; both terms describe the same mode of nutrition.$
9.
$A plant is kept in a glass box where the air is filtered to remove all Carbon Dioxide. Even with ample light and water, the plant dies after some time. What is the most accurate reason?$
A. $The plant suffocated because it couldn't breathe Oxygen.$
B. $The plant couldn't synthesize food, leading to the depletion of its energy reserves.$
C. $CO_2$
D. $CO_2$
10.
$What is the biological significance of the 'waxy cuticle' found on the surface of many leaves in relation to photosynthesis?$
A. $It absorbs specific wavelengths of light that chlorophyll cannot.$
B. $It prevents water loss, ensuring that the leaf cells remain turgid for gas exchange.$
C. $It acts as a storage layer for the glucose produced.$
D. $CO_2$

Download the worksheet for Nutrition in Plants and Animals - Modes of Nutrition in Plants and Photosynthesis to practice offline. It includes additional chapter-level practice questions.

Other Modes of Nutrition: Parasitic, Saprotrophic, and Symbiosis

Subtopic

Other Modes of Nutrition: Parasitic, Saprotrophic, and Symbiosis under Nutrition in Plants and Animals for Grade 7 CBSE.

About Topic & Revision

Preview questions (no answers)

1.
$Which of these is an example of a leguminous plant?$
A. $Rice$
B. $Pea$
C. $Corn$
D. $Potato$
2.
$What is the mode of nutrition where an organism prepares a 'solution' from dead matter?$
A. $Parasitic$
B. $Saprotrophic$
C. $Symbiotic$
D. $Autotrophic$
3.
$Which of these organisms obtains nutrition from a host without killing it immediately?$
A. $Lion$
B. $Eagle$
C. $Cuscuta$
D. $Snake$
4.
$Organisms that cannot make their own food and must depend on others are called:$
A. $Autotrophs$
B. $Heterotrophs$
C. $Producers$
D. $Chlorophyllous$
5.
$Identify the incorrect statement about saprotrophs from the following:$
A. $They grow on dead and decaying matter$
B. $They have a green pigment to trap sunlight$
C. $They secrete enzymes to digest food externally$
D. $They play a role in nutrient recycling$
6.
$Rhizobium$
A. $The clover would grow faster$
B. $The clover would have difficulty obtaining nitrogen$
C. $The clover would start performing more photosynthesis$
D. $The soil would become richer in minerals$
7.
$How do fungi typically reproduce and spread to new sources of food like moist bread?$
A. $By producing seeds$
B. $Through underground roots$
C. $By releasing tiny spores into the air$
D. $By dividing into two equal halves$
8.
$Which of the following is an example of an organism that performs saprotrophic nutrition but is NOT a fungus?$
A. $Bread mold$
B. $Mushroom$
C. $Certain types of Bacteria$
D. $Cuscuta$
9.
$In the symbiotic relationship of a lichen, what would happen if the environment became extremely polluted with sulfur dioxide, which kills the fungal partner?$
A. $The alga would survive independently by making more food.$
B. $The alga would die because it lacks the protection and mineral supply provided by the fungus.$
C. $The alga would start eating the dead fungus.$
D. $The lichen would turn into a parasite on the tree.$
10.
$If a piece of bread is kept in a refrigerator, why does it take much longer for mold to appear compared to keeping it on a kitchen counter?$
A. $The refrigerator is too bright for fungi.$
B. $The low temperature in the refrigerator inhibits the growth and metabolic activity of the fungal spores.$
C. $The refrigerator is too dry for the bread to be digested.$
D. $Fungal spores cannot enter a sealed refrigerator.$

Download the worksheet for Nutrition in Plants and Animals - Other Modes of Nutrition: Parasitic, Saprotrophic, and Symbiosis to practice offline. It includes additional chapter-level practice questions.

Digestion in Humans and the Alimentary Canal

Subtopic

Digestion in Humans and the Alimentary Canal under Nutrition in Plants and Animals for Grade 7 CBSE.

About Topic & Revision

Preview questions (no answers)

1.
$The process of absorption happens when digested food passes into the __________ of the wall of the small intestine.$
A. $Muscles$
B. $Blood vessels$
C. $Air sacs$
D. $Bone marrow$
2.
$How many molars are typically found in each jaw of an adult human?$
A. $4$
B. $2$
C. $6$
D. $8$
3.
$The breakdown of complex components of food into simpler substances is called:$
A. $Ingestion$
B. $Digestion$
C. $Assimilation$
D. $Egestion$
4.
$Which organ is responsible for the secretion of bile?$
A. $Gall bladder$
B. $Pancreas$
C. $Liver$
D. $Stomach$
5.
$Which of these correctly matches the tooth type with its specific count in one jaw of an adult human?$
A. $Canines: 4$
B. $Incisors: 4$
C. $Molars: 4$
D. $Premolars: 2$
6.
$If a person's gallbladder is surgically removed, which process of digestion is likely to be most affected?$
A. $Digestion of proteins$
B. $Digestion of carbohydrates$
C. $Emulsification and digestion of fats$
D. $Absorption of water$
7.
$Where does the tongue attach to the buccal cavity?$
A. $At the front to the floor$
B. $At the back to the roof$
C. $At the back to the floor$
D. $At the sides to the teeth$
8.
$In the human digestive system, where does the majority of water absorption occur?$
A. $Stomach$
B. $Small Intestine$
C. $Large Intestine$
D. $Oesophagus$
9.
$Which of the following nutrients is digested last in the human alimentary canal?$
A. $Starch$
B. $Proteins$
C. $Fats$
D. $Simple Sugars$
10.
$Which of the following represents the correct chemical equation for photosynthesis?$
A. $6CO_2 + 6H_2O \xrightarrow[Chlorophyll]{Sunlight} C_6H_{12}O_6 + 6O_2$
B. $6O_2 + 6H_2O \xrightarrow[Chlorophyll]{Sunlight} C_6H_{12}O_6 + 6CO_2$
C. $C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + Energy$
D. $6CO_2 + 6O_2 \xrightarrow[Chlorophyll]{Sunlight} C_6H_{12}O_6 + 6H_2O$

Download the worksheet for Nutrition in Plants and Animals - Digestion in Humans and the Alimentary Canal to practice offline. It includes additional chapter-level practice questions.

Digestion in Grass-Eating Animals

Subtopic

Digestion in Grass-Eating Animals under Nutrition in Plants and Animals for Grade 7 CBSE.

About Topic & Revision

Preview questions (no answers)

1.
$In which part of the digestive tract of a cow does the actual chemical digestion by enzymes occur?$
A. $Rumen$
B. $Abomasum$
C. $Mouth$
D. $Reticulum$
2.
$Which of these is a result of the rumination process?$
A. $The animal gets tired.$
B. $Plant fibers are broken down more effectively.$
C. $Food becomes harder to digest.$
D. $The stomach becomes smaller.$
3.
$cellulose$
A. $Enzymes from the liver$
B. $Microorganisms$
C. $Acidic juices from the mouth$
D. $Grass seeds$
4.
$Identify the process: Small lumps of food are brought back from the rumen to the mouth to be chewed.$
A. $Digestion$
B. $Rumination$
C. $Absorption$
D. $Assimilation$
5.
$In the digestive process of a ruminant, food is swallowed twice in different states. Based on the provided flowchart, which types of food do A and B represent?$
A. $A: Re-chewed cud; B: Freshly eaten grass$
B. $A: Freshly eaten grass; B: Re-chewed cud$
C. $A: Liquid nutrients; B: Freshly eaten grass$
D. $A: Freshly eaten grass; B: Fully digested waste$
6.
$Grass-eating animals are often seen constantly chewing even when they are not eating grass. What are they chewing?$
A. $Saliva only$
B. $Small stones to help grind food$
C. $Partially digested food brought back from the rumen$
D. $Their own tongue$
7.
$What makes the Rumen a suitable place for bacteria to break down cellulose?$
A. $It is very small and acidic$
B. $It is a large chamber that provides time for fermentation$
C. $It is located after the small intestine$
D. $It contains only hydrochloric acid$
8.
$Why does a ruminant produce such large volumes of saliva (up to 150 liters a day in cattle)?$
A. $To provide enough water for the omasum's absorption function.$
B. $To neutralize the organic acids produced during rumen fermentation.$
C. $To help the grass slide down the esophagus faster.$
D. $To wash away the methane gas from the lungs.$
9.
$What happens to the liquid part of the food in the omasum?$
A. $It is mixed with bile.$
B. $Most of it is absorbed into the bloodstream along with electrolytes.$
C. $It is turned into methane gas.$
D. $It is sent back to the mouth for more chewing.$
10.
$The production of Volatile Fatty Acids (VFAs) in the rumen is a result of which metabolic process?$
A. $Aerobic respiration$
B. $Anaerobic fermentation$
C. $Photosynthesis$
D. $Transpiration$

Download the worksheet for Nutrition in Plants and Animals - Digestion in Grass-Eating Animals to practice offline. It includes additional chapter-level practice questions.

Feeding and Digestion in Amoeba

Subtopic

Feeding and Digestion in Amoeba under Nutrition in Plants and Animals for Grade 7 CBSE.

About Topic & Revision

Preview questions (no answers)

1.
$When an Amoeba grows too large, it can:$
A. $Stop eating$
B. $Turn into a plant$
C. $Divide into two daughter cells$
D. $Grow a hard shell$
2.
$What provides the fluid environment for all organelles in Amoeba?$
A. $Nucleus$
B. $Cell wall$
C. $Cytoplasm$
D. $Food vacuole$
3.
$The process of 'Ingestion' in Amoeba involves:$
A. $Taking food into the body$
B. $Removing waste from the body$
C. $Using food for energy$
D. $Breaking down food with juices$
4.
$Which of the following is NOT part of Amoeba's nutrition?$
A. $Assimilation$
B. $Photosynthesis$
C. $Ingestion$
D. $Digestion$
5.
$Which of the following is essential for an Amoeba to find its food?$
A. $Eyesight$
B. $Sense of touch or chemical sensing$
C. $Hearing$
D. $Sense of smell through a nose$
6.
$How does Amoeba's digestion differ from a human's?$
A. $Amoeba doesn't use any chemicals$
B. $Amoeba lacks a specialized digestive system with organs$
C. $Humans digest food inside a single cell$
D. $Amoeba does not need to absorb nutrients$
7.
$Which is the correct order of the stages of nutrition in Amoeba?$
A. $Ingestion -> Digestion -> Absorption -> Assimilation -> Egestion$
B. $Digestion -> Ingestion -> Egestion -> Absorption -> Assimilation$
C. $Absorption -> Assimilation -> Ingestion -> Digestion -> Egestion$
D. $Ingestion -> Absorption -> Digestion -> Egestion -> Assimilation$
8.
$Which of the following would NOT be found inside a newly formed food vacuole of an Amoeba?$
A. $A microscopic organism$
B. $A small amount of water$
C. $The Amoeba's own nucleus$
D. $Partially trapped pond debris$
9.
$In the context of the CBSE curriculum, why is Amoeba used as a model to study nutrition?$
A. $Because it has the most complex digestive system$
B. $Because it demonstrates all basic stages of animal nutrition in a single cell$
C. $Because it is the only organism that can live without food$
D. $Because it is a plant-like organism that behaves like an animal$
10.
$The digestion of food in Amoeba is a 'multi-step' process. Which of the following describes the correct order of the chemical environment within the vacuole?$
A. $Neutral only$
B. $Acidic then alkaline/neutral$
C. $Highly alkaline then acidic$
D. $Gas-filled then liquid-filled$

Download the worksheet for Nutrition in Plants and Animals - Feeding and Digestion in Amoeba to practice offline. It includes additional chapter-level practice questions.

Nutrition in Plants and Animals

Modes of Nutrition in Plants and Photosynthesis

❓Preview questions (no answers)

Other Modes of Nutrition: Parasitic, Saprotrophic, and Symbiosis

❓Preview questions (no answers)

Digestion in Humans and the Alimentary Canal

❓Preview questions (no answers)

Digestion in Grass-Eating Animals

❓Preview questions (no answers)

Feeding and Digestion in Amoeba

❓Preview questions (no answers)

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