Obtaining Nutrition in Organisms Quiz

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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 Signup and view all the answers

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. Signup and view all the answers

What is the role of saliva in the digestion of food?

Saliva helps in the initial breakdown of starch into maltose. Signup and view all the answers

Why is nitrogen considered an essential element for plants?

Nitrogen is used in the synthesis of proteins and other compounds. Signup and view all the answers

How do autotrophs meet their energy requirements?

Autotrophs meet their energy requirements through photosynthesis. Signup and view all the answers

Explain the role of roots in photosynthesis for terrestrial plants.

Roots absorb water from the soil for photosynthesis. Signup and view all the answers

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. Signup and view all the answers

How do different organisms access and utilize food?

Organisms have a range of strategies for obtaining and utilizing food. Signup and view all the answers

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. Signup and view all the answers

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. Signup and view all the answers

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. Signup and view all the answers

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. Signup and view all the answers

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. Signup and view all the answers

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. Signup and view all the answers

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. Signup and view all the answers