Podcast
Questions and Answers
Which of the following describes the relationship between a cleaner fish and a larger fish?
Which of the following describes the relationship between a cleaner fish and a larger fish?
- Mutualism (correct)
- Parasitism
- Commensalism
- Endosymbiosis
Which of the following is an example of a benthic organism?
Which of the following is an example of a benthic organism?
- A sea star living on the ocean floor (correct)
- A whale swimming in the open ocean
- A phytoplankton floating near the surface
- A jellyfish drifting in the ocean current
What is the main difference between herbivores and suspension feeders?
What is the main difference between herbivores and suspension feeders?
- Herbivores eat plants, while suspension feeders eat only small particles
- Herbivores digest food internally, while suspension feeders digest food externally
- Herbivores are typically larger than suspension feeders
- Herbivores obtain nutrients directly from plants, while suspension feeders obtain nutrients from filtering small particles from the surrounding environment (correct)
Which of the following is NOT a characteristic of a species' gene pool?
Which of the following is NOT a characteristic of a species' gene pool?
What is the correct scientific name for a species, according to binomial nomenclature?
What is the correct scientific name for a species, according to binomial nomenclature?
Which of the following phyla are classified as coelomate?
Which of the following phyla are classified as coelomate?
Which of these is a characteristic of deuterostomes?
Which of these is a characteristic of deuterostomes?
What is the main difference between intertidal and subtidal marine environments?
What is the main difference between intertidal and subtidal marine environments?
Which group exhibits the following characteristics: radial symmetry, diploblastic, and sedentary lifestyle?
Which group exhibits the following characteristics: radial symmetry, diploblastic, and sedentary lifestyle?
Which of the following invertebrates is characterized by an asymmetrical body plan and no true tissues?
Which of the following invertebrates is characterized by an asymmetrical body plan and no true tissues?
Which of the following species demonstrates direct development?
Which of the following species demonstrates direct development?
Which of the following invertebrates represents a protostome?
Which of the following invertebrates represents a protostome?
Which of the following statements best defines a 'pseudocoelom'?
Which of the following statements best defines a 'pseudocoelom'?
Flashcards
Evolutionary relationship
Evolutionary relationship
The connection between different species based on their shared ancestry.
Species Gene pool
Species Gene pool
The total genetic diversity within a species that can interbreed.
Binomial Nomenclature
Binomial Nomenclature
A two-part naming system for species including genus and species name.
Ectosymbionts
Ectosymbionts
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Mutualism
Mutualism
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Multicellular
Multicellular
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Unicellular
Unicellular
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Bilateral Symmetry
Bilateral Symmetry
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Radial Symmetry
Radial Symmetry
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Asymmetrical
Asymmetrical
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Protostomes
Protostomes
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Coelomate
Coelomate
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Terrestrial Habitat
Terrestrial Habitat
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Study Notes
Invertebrate Classification
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Cell Number: Invertebrates can be unicellular (made of a single cell with no membrane-bound organelles) or multicellular (made of many cells specialized for specific functions). Most invertebrates are multicellular (metazoa).
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Body Symmetry: Bilateral symmetry (right and left sides are mirror images) is seen in crustaceans and annelids. Radial symmetry (body parts arranged around a central axis) is found in Cnidaria (jellyfish, corals, starfish). Asymmetrical symmetry means no symmetry, like in sponges (Porifera).
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Developmental Patterns: Diploblastic organisms have two germ layers. Triploblastic organisms have three germ layers (ectoderm, endoderm, and mesoderm).
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Body Cavity: Acoelomates lack a body cavity. Pseudocoelomates have a body cavity but not completely lined by mesoderm. Coelomates have a true body cavity completely lined by mesoderm.
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Embryonic Mouth Formation: Protostomes form the mouth first, and Deuterostomes form the anus first.
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Evolutionary Relationships: Taxon refers to a named group of organisms with similar morphology, genetics, biochemistry, or behaviors. Species share a common gene pool.
Invertebrate Characteristics
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Feeding:
- Herbivores eat plants.
- Carnivores eat other animals.
- Suspension feeders filter small particles from water.
- Deposit feeders digest organic material in sediments.
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Symbiotic Relationships:
- Ectosymbionts live on the surface of their hosts.
- Endosymbionts live inside their hosts.
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Lifestyle: Invertebrates can live in diverse habitats. Some are mobile, sessile (stay in one place), or sedentary (move, but not far). Habitats include intertidal zones (between high and low tide marks), and subtidal zones (below low tide).
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Habitat: Invertebrates can be terrestrial, marine, or aquatic, in both planktonic (drifting) and benthic (ocean floor) environments.
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Binomial Nomenclature: Scientific names are two-part names (e.g., genus and species; written with first letter of genus capitalized).
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