DNA sequence data for diplomonad, euglenozoan, a plant and an unidentified protist suggest that the unidentified species is mostly closely related to the diplomonad. Further studies reveal that the unknown species has fully functional mitochondria. Based on these data, at what point on the Phylogenetic tree given in Figure 25.9 “Exploring Eukaryotic Diversity”, in the textbook, did the mystery protists lineage probably diverge from other eukaryotic lineages. Introduction: The diplomonads are the group of flagella containing organisms and are mostly parasitic in nature. They are placed under zooflagellates within kingdom protista. Euglenozoa are unicellular large group of flagellate excavate that include free living species.

Question

Life cycle complexity Describe a generalized complex life cycle for a parasite that would encompass one or more intermediates hosts and multiple larval stages. Why would this heteroxenic life cycle be an evolutionary advantage over a monoxenic one?

Answer 1

Question

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 25.3, Problem 3CC

Summary Introduction

To explain:

DNA sequence data for diplomonad, euglenozoan, a plant and an unidentified protist suggest that the unidentified species is mostly closely related to the diplomonad. Further studies reveal that the unknown species has fully functional mitochondria. Based on these data, at what point on the Phylogenetic tree given in Figure 25.9 “Exploring Eukaryotic Diversity”, in the textbook, did the mystery protists lineage probably diverge from other eukaryotic lineages.

Introduction:

The diplomonads are the group of flagella containing organisms and are mostly parasitic in nature. They are placed under zooflagellates within kingdom protista. Euglenozoa are unicellular large group of flagellate excavate that include free living species.

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Life cycle complexity Describe a generalized complex life cycle for a parasite that would encompass one or more intermediates hosts and multiple larval stages. Why would this heteroxenic life cycle be an evolutionary advantage over a monoxenic one?

1. How do members of Eukarya differ from the prokaryotic groups of Chp 26 (your text lists 4 major differences)? Do these differences represent a greater success and superiority of eukaryotic over prokaryotic cells? 2. Examine Figure 27.1 from your text. How does this phylogenetic tree show that "Protists" are paraphyletic? Hint: think about what the term "paraphyletic" means in your answer.. 3. Describe at least two impacts that protists have on humans and two ecological importance's protists have on the planet. 4. What is direct sequencing and how has it been used to discover new lineages in the eukaryotic group? Be specific! 5. What is the endosymbiosis theory and what are thought to have been the three main steps in the theory? What are thought to have been the two main steps in the nucleus formation? • Previous Next MacBook Pro G Search or type URL 23 %24 &

Molecular 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?

Answer 2

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 25.3, Problem 3CC

Summary Introduction

To explain:

DNA sequence data for diplomonad, euglenozoan, a plant and an unidentified protist suggest that the unidentified species is mostly closely related to the diplomonad. Further studies reveal that the unknown species has fully functional mitochondria. Based on these data, at what point on the Phylogenetic tree given in Figure 25.9 “Exploring Eukaryotic Diversity”, in the textbook, did the mystery protists lineage probably diverge from other eukaryotic lineages.

Introduction:

The diplomonads are the group of flagella containing organisms and are mostly parasitic in nature. They are placed under zooflagellates within kingdom protista. Euglenozoa are unicellular large group of flagellate excavate that include free living species.

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Answer 3

Question

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 25.3, Problem 3CC

Summary Introduction

To explain:

DNA sequence data for diplomonad, euglenozoan, a plant and an unidentified protist suggest that the unidentified species is mostly closely related to the diplomonad. Further studies reveal that the unknown species has fully functional mitochondria. Based on these data, at what point on the Phylogenetic tree given in Figure 25.9 “Exploring Eukaryotic Diversity”, in the textbook, did the mystery protists lineage probably diverge from other eukaryotic lineages.

Introduction:

The diplomonads are the group of flagella containing organisms and are mostly parasitic in nature. They are placed under zooflagellates within kingdom protista. Euglenozoa are unicellular large group of flagellate excavate that include free living species.

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Answer 4

Question

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 25.3, Problem 3CC

Summary Introduction