Podcast
Questions and Answers
What is the major function of colloblasts in comb jellies?
What is the major function of colloblasts in comb jellies?
- Locomotion
- Feeding (correct)
- Excretion
- Reproduction
Which phylum consists of animals that are radially symmetric and diploblastic?
Which phylum consists of animals that are radially symmetric and diploblastic?
- Phylum Myxozoa
- Phylum Cnidaria
- Phylum Ctenophora (correct)
- Phylum Platyhelminthes
What is the main distinguishing feature of comb jellies when observed?
What is the main distinguishing feature of comb jellies when observed?
- Flame cells for excretion
- Bristle-like mechanoreceptors
- Rows of ciliary plates or combs (correct)
- Sophisticated organs for locomotion
What is the primary method by which comb jellies facilitate feeding?
What is the primary method by which comb jellies facilitate feeding?
Which phylum is characterized by being dorsoventrally flattened and ribbon-like, with both free-living and parasitic species?
Which phylum is characterized by being dorsoventrally flattened and ribbon-like, with both free-living and parasitic species?
What is the function of protonephridia or flame cells in flatworms?
What is the function of protonephridia or flame cells in flatworms?
What type of data is used for investigating evolution, according to the text?
What type of data is used for investigating evolution, according to the text?
During which period did the Ediacaran Fauna exist?
During which period did the Ediacaran Fauna exist?
Which organism is considered to be the oldest animal discovered without the aid of a microscope?
Which organism is considered to be the oldest animal discovered without the aid of a microscope?
What is the main feature that sponges and choanoflagellates are claimed to share?
What is the main feature that sponges and choanoflagellates are claimed to share?
What is the significance of Cadherin in relation to sponges?
What is the significance of Cadherin in relation to sponges?
What behavior do two organisms exhibit in endosymbiosis?
What behavior do two organisms exhibit in endosymbiosis?
Which of the following are characteristics shared by all members of Metazoa?
Which of the following are characteristics shared by all members of Metazoa?
Which phylum lacks a gut, muscles, nervous system, and polarity but utilizes choanocytes for suspension feeding?
Which phylum lacks a gut, muscles, nervous system, and polarity but utilizes choanocytes for suspension feeding?
Which of the following is true about phylum Porifera?
Which of the following is true about phylum Porifera?
What is the internal skeleton of adult sponges composed of when present?
What is the internal skeleton of adult sponges composed of when present?
In what type of body cavity are coelomates classified?
In what type of body cavity are coelomates classified?
Which subphylum do cnidarians like jellies, sea anemones, and corals belong to?
Which subphylum do cnidarians like jellies, sea anemones, and corals belong to?
What is a key feature of specialized cnidae that facilitate prey capture in cnidarians?
What is a key feature of specialized cnidae that facilitate prey capture in cnidarians?
Which type of reproduction results in a larvae with several cell layers in sponges?
Which type of reproduction results in a larvae with several cell layers in sponges?
'Polyps' proliferate asexually by which method in cnidarians like sea anemone?
'Polyps' proliferate asexually by which method in cnidarians like sea anemone?
Study Notes
Phylum Characteristics
- Phylum Cnidaria consists of radially symmetric, diploblastic animals
- Phylum Platyhelminthes consists of dorsoventrally flattened, ribbon-like animals with both free-living and parasitic species
- Phylum Porifera lacks a gut, muscles, nervous system, and polarity, but utilizes choanocytes for suspension feeding
Comb Jellies
- Colloblasts are used for capturing prey in comb jellies
- Comb jellies are characterized by the presence of rows of cilia (comb-like structures) that reflect light, making them sparkle
- Comb jellies facilitate feeding through the use of colloblasts, which capture prey
Flatworms
- Protonephridia or flame cells are used for excretion and osmoregulation in flatworms
Evolution
- Morphological data is used for investigating evolution
Fossil Record
- The Ediacaran Fauna existed during the Ediacaran period
- Dickinsonia is considered the oldest animal discovered without the aid of a microscope
Sponges and Choanoflagellates
- Sponges and choanoflagellates share a key feature: the presence of choanocytes
- Cadherin is significant in sponges because it is involved in cell adhesion
Endosymbiosis
- In endosymbiosis, two organisms, such as algae and coral, live in a symbiotic relationship
Metazoa
- All members of Metazoa share the characteristics of multicellularity and heterotrophy
Sponges
- The internal skeleton of adult sponges is composed of spicules or spongin when present
- Sponges are classified as coelomates, with a true body cavity
Cnidarians
- Cnidarians, such as jellies, sea anemones, and corals, belong to the subphylum Medusozoa
- Specialized cnidae (stinging cells) facilitate prey capture in cnidarians
- Polyps proliferate asexually through budding in cnidarians like sea anemones
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Description
Test your knowledge on the general characteristics shared by members of Metazoa, including land vertebrates like amphibians, reptiles, birds, and mammals. Explore topics such as Derm Layers, Body Cavity types, and key traits like being multicellular heterotrophs without cell walls.
