18 Questions
What type of organisms derive nutrition from dead and decaying matter?
Saprotrophs
Why are a few plants and all animals considered heterotrophs?
Because they feed on other organisms for nutrition
Which term best describes a plant that traps and feeds on insects?
Parasite
What is the term used for green plants that synthesise their own food?
Autotrophs
Which organism is an example of a parasite?
Cuscuta (Dodder plant)
In photosynthesis, what gas do plants take in and release respectively?
Take in carbon dioxide, release oxygen
What is the main feature of plants that can trap insects and digest them?
They have pitcher-like structures on their leaves
Why do plants that can trap insects and digest them not resemble green plants?
They lack mouths like animals
What type of organisms lack chlorophyll and cannot make food by photosynthesis?
Saprotrophs
What is the mode of nutrition in which organisms take in nutrients from dead and decaying matter called?
Saprotrophic nutrition
What is the main distinction between green plants and organisms like fungi?
Possession of chlorophyll
What are organisms with saprotrophic mode of nutrition called?
Saprotrophs
How do fungi acquire nutrients?
By absorbing nutrients from their surroundings
Fungi growing on pickles, leather, and clothes due to hot and humid weather represent which mode of nutrition?
Saprotrophic nutrition
What is the color of the fluffy umbrella-like patches that grow on rotting wood during the rainy season?
White
Which term describes the relationship where some fungi live inside the roots of plants and share shelter and nutrients?
Symbiosis
Paheli wants to know if fungi cause diseases. What category do fungi belong to when they cause harm to other organisms?
Heterotrophs
Boojho's grandfather mentioned his wheat fields were spoiled by a fungus. What type of organism is a fungus in this context?
Parasite
Study Notes
Modes of Nutrition
- Organisms that derive nutrition from dead and decaying matter are saprotrophs.
- A few plants and all animals are considered heterotrophs because they cannot synthesise their own food.
Carnivorous Plants
- A plant that traps and feeds on insects is known as an insectivorous plant.
- Green plants that synthesise their own food are autotrophs.
- The main feature of plants that can trap insects and digest them is the presence of digestive enzymes.
- Insectivorous plants do not resemble green plants because they have adapted to obtain nutrients from insects due to a lack of essential nutrients in their environment.
Photosynthesis
- In photosynthesis, plants take in carbon dioxide and release oxygen respectively.
Fungi
- Fungi are organisms that lack chlorophyll and cannot make food by photosynthesis.
- Fungi acquire nutrients by breaking down dead and decaying organic matter.
- The mode of nutrition in which organisms take in nutrients from dead and decaying matter is called saprotrophic nutrition.
- Fungi growing on pickles, leather, and clothes due to hot and humid weather represent saprotrophic mode of nutrition.
- The fluffy umbrella-like patches that grow on rotting wood during the rainy season are white in color.
Fungi-Plant Relationships
- The relationship where some fungi live inside the roots of plants and share shelter and nutrients is known as mycorrhizal relationship.
Fungi and Disease
- Fungi can cause diseases in other organisms.
- Fungi that cause harm to other organisms are categorized as pathogens.
- In the context of Boojho's grandfather's wheat fields being spoiled, a fungus is an example of a pathogen.
Test your knowledge on organism nutrition, photosynthesis, and different types of organisms like saprotrophs and heterotrophs. Questions cover topics such as why organisms take food, differences between parasites and saprotrophs, testing the presence of starch in leaves, and the process of synthesis.
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