18 Questions
Explain the function of xylem in plants.
Transport of water
What is the role of the kidneys in human beings?
Excretion of soluble nitrogen compounds
Describe the autotrophic mode of nutrition.
Requires carbon dioxide, water, and sunlight
Where does the breakdown of pyruvate to give carbon dioxide, water, and energy take place?
Mitochondria
How are fats digested in our bodies? Where does this process take place?
Fats are digested in the small intestine with the help of bile and lipase enzymes.
What is the role of saliva in the digestion of food?
Saliva helps in the initial breakdown of starch into maltose.
Why is nitrogen considered an essential element for plants?
Nitrogen is used in the synthesis of proteins and other compounds.
How do autotrophs meet their energy requirements?
Autotrophs meet their energy requirements through photosynthesis.
Explain the role of roots in photosynthesis for terrestrial plants.
Roots absorb water from the soil for photosynthesis.
What are some other raw materials, besides water, that plants need for building their body?
Plants also need materials like nitrogen, phosphorus, iron, and magnesium.
How do different organisms access and utilize food?
Organisms have a range of strategies for obtaining and utilizing food.
What is the nutritive apparatus used by a cow and a lion?
A cow has a complex digestive system for processing plant material, while a lion has sharp teeth and strong jaws for hunting and consuming prey.
What is the basic structure of the alimentary canal in human beings?
The alimentary canal in human beings is basically a long tube extending from the mouth to the anus.
How do single-celled organisms like Amoeba take in and digest their food?
In single-celled organisms like Amoeba, the food is taken in by the entire surface of the cell. Amoeba uses temporary finger-like extensions of the cell surface to engulf food particles, forming a food-vacuole. Inside the food-vacuole, complex substances are broken down into simpler ones which then diffuse into the cytoplasm, and the remaining undigested material is moved to the surface of the cell and thrown out.
How does Paramecium, another unicellular organism, take in and process its food?
In Paramecium, which is also a unicellular organism, the cell has a definite shape and food is taken in at a specific spot. The food is moved to this spot by the movement of cilia which cover the entire surface of the cell.
What are some examples of organisms that obtain nutrition in a parasitic manner?
Examples of organisms that obtain nutrition in a parasitic manner include cuscuta (amar-bel), ticks, lice, leeches, and tapeworms.
How does the complexity of an organism's digestive system relate to the way it obtains nutrition?
As the complexity of the organism increases, different parts become specialized to perform different functions in the digestive system. In single-celled organisms, the food may be taken in by the entire surface, but in more complex organisms, the digestive system becomes more specialized.
Explain the role of food vacuoles in the digestion process of Amoeba.
In Amoeba, food particles are engulfed by temporary finger-like extensions of the cell surface, forming a food-vacuole. Inside the food-vacuole, complex substances are broken down into simpler ones, which then diffuse into the cytoplasm. The remaining undigested material is moved to the surface of the cell and thrown out.
Test your knowledge on how different organisms obtain nutrition. From fungi to parasitic organisms, learn about the diverse ways of obtaining and breaking down food in living beings.
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