10 Questions
What is the primary function of baleen in filter feeding?
To sift small organisms like krill from the water
Which type of feeder ingests large pieces of food and tears them into smaller pieces?
Bulk feeder
What is the process called when single-celled organisms process their food inside their cells?
Intracellular digestion
What is the term for animals that eat their way through soil, digesting and excreting as they move?
Substrate feeders
What is the term for animals that suck nutrient-rich fluids from living hosts?
Fluid feeders
What is the term for the process where food is broken down outside cells?
Extracellular digestion
Which type of feeder uses their body parts to move water towards a feeding structure?
Suspension feeder
What is the term for the cavity found in simple animals like Hydra, where food is broken down outside cells?
Gastrovascular cavity
What is the structure used by filter feeders to sift small organisms from the water?
Baleen
What is the purpose of food vacuoles in single-celled organisms?
To digest food
Study Notes
Feeding Mechanisms
- Suspension feeding: Organisms use body parts to move water towards a feeding structure, sifting through food particles suspended in the water.
- Filter feeding: Animals like humpback whales sift small organisms like krill through structures called baleen, extracting food particles suspended in the water.
- Substrate feeding: Organisms like earthworms eat their way through soil, digesting and excreting as they move.
- Fluid feeding: Animals like mosquitoes feed by sucking nutrient-rich fluids from living hosts using specialized mouth structures.
Nutrient Uptake in Cells among Animals
Intracellular Digestion
- Occurs inside cells in single-celled organisms like protists, amoeba, and paramecium.
- Food is processed through food vacuoles.
Extracellular Digestion
- Occurs outside cells in animals with either an incomplete or complete digestive system.
- In simple animals like Hydra, food is broken down outside cells in the gastrovascular cavity.
- These animals have a single opening where food goes in and waste comes out.
Learn about the different ways organisms obtain food, including suspension feeding, filter feeding, substrate feeding, and fluid feeding. Understand the unique characteristics of each method and how they are used by various species.
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