Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 28.2, Problem 5CC
Summary Introduction
To explain: The features of the ancient choanoflagellate ancestors of animals that were important in the evolution of multicellularity, and the function served by these features in modern choanoflagellates.
Introduction: Choanoflagellates are eukaryotic organisms. These are believed to be the species that have the closest association with multicellular organisms (especially animals). They are unicellular and they contain flagella for locomotion.
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Chapter 28 Solutions
Biology
Ch. 28.1 - An Introduction to Protists Core Skill:...Ch. 28.2 - Prob. 1CCCh. 28.2 - Evolution and Relationships Concept Check: How do...Ch. 28.2 - Evolution and Relationships Concept Check: How do...Ch. 28.2 - Prob. 4CCCh. 28.2 - Prob. 5CCCh. 28.3 - Prob. 1EQCh. 28.3 - Prob. 2EQCh. 28.4 - Prob. 1CCCh. 28.4 - Prob. 2CC
Ch. 28.4 - Core Skill: Modeling The goal of this modeling...Ch. 28 - Prob. 1TYCh. 28 - Prob. 2TYCh. 28 - Prob. 3TYCh. 28 - Prob. 4TYCh. 28 - What organisms have tertiary plastids? a. certain...Ch. 28 - What is surprising about mixotrophs? a. They have...Ch. 28 - What advantages do diatoms obtain from sexual...Ch. 28 - What are extrusomes? a. hairs on flagella b....Ch. 28 - Prob. 9TYCh. 28 - Prob. 10TYCh. 28 - Prob. 1CQCh. 28 - Why have molecular biologists sequenced the...Ch. 28 - Core Concept: Science and Society Why are the...Ch. 28 - Prob. 1COQCh. 28 - Prob. 2COQ
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- What two phyla are most closely related to theTenericutes?arrow_forwardSome molecular evidence suggests that the sister group of animals is not the choanoflagellates, but rather a group of parasitic protists, Mesomycetozoa. Given that these parasites lack collar cells, can this hypothesis be correct? Explain.arrow_forwardWhat is the literal meaning of the order names Urodela and Anura? What major features distinguish members of these two orders from each other?arrow_forward
- Which of the following taxa of animals possess slime glands, primitive gills and can tie themselves into overhand knots? --Class Cephalaspidomorphi/Hyeroartia --Class Sarcopterygii --Suborder Amphisbaenia --Order Gymnophiona --Class Myxini/Hyperotretiarrow_forwardContrast the field of systematics with that of taxonomy and phylogenetics. How is systematics defined? How is taxonomy and phylogenetics similar or different from systematics? How did the systematic placement of Calostoma change our understanding of this taxon, in regards to the study Phylogeny of Calostoma, the gelatinous-stalked puffball, based on nuclear and mitochondrial ribosomal DNA sequences by Hughey and colleagues?arrow_forwardHow old are the oldest fossils of Eukaryotic cells?arrow_forward
- How are forams useful for researchers to study changes in ocean temperature over time? What are mixotrophs? What is endosymbiosis and why is it consider to be the source of eukaryotic diversity? Why are we confident this only happens once? What is primary and secondary endosymbiosis? Was there another endosymbiotic event that led to a third lineage? What group of organisms possesses a structure that might suggest this possibility and what is the structure? Why is the structure question different from the ancestor of other plastids? What are diatom blooms and why are they of particular interest to climate change scientists?arrow_forwardMolecular fossils further indicate the presence of ciliates and dinoflagellates in the emerging eukaryotic world and show that algae were expanding to become major photosynthesizers in the oceans. How can we explain this diversification?arrow_forwardWhat is the reason for saying that sponges are closely related to, and probably evolved from, several members of the Kingdom Protozoa?arrow_forward
- The phylum Platyhelminthes has what type of symmetry?arrow_forwardIchthyophthirius multifiliis - the etiologic agent of "ich". Life Cycle What role do each of the following play? Organelle of Lieberkunn perforatorium mucocystarrow_forwardIs the presence of myomeres a symplesiomorphic or synapomorphic feature of vertebrates compared to conditions in other deuterostome metazoans? And are these structures symplesiomorphic, synapomorphic, or neither for vertebrates considered alone?arrow_forward
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