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Animal Diversity
Nematodes are commonly known as roundworms. They are free-living, very tiny organisms. They have an elongated and tubular body. These organisms have a nervous system and are mostly act as parasites to both animals and plants.
Platyhelminthes
Platyhelminthes are also known as "flatworms" because as they are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.
1. Are there newer trends in determining evolutionary relationships? If yes, what are they?
2. Does classifying invertebrates according to habitat and lifestyle helpful? Why or why not?
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- 1. How come that evolutionary relationship takes place based on anatomical evidence. 2. What is Phylogeny? 3. In the context of evolutionary relationship among ants, wasps and bees, how come that these insects have shared common characteristics?1. Why is determination of evolutionary relationships among the different invertebrate phyla important? 2. If you are to determine evolutionary relationships among different invertebrate groups, which technique would you use?1. Why is it important (or interesting) to find transitional fossils? 2. What are the different lines of evidence that point to a shared ancestry among ourselves and other vertebrates? Invertebrates? 3. What processes (evolutionary, developmental, other) result in the changes in animal type the answer
- Activity 17. Examine the table showing the classification of four organisms. Then answer the Тахon Green Frog Mountain Lion Domestic Dog Human Kingdom Phylum Class Animalia Chordata Animalia Chordata Animalia Animalia Chordata Chordata Mammalia Amphibia Anura Mammalia Mammalia Order Carnivora Carnivora Primates Family Genus Ranidae Felidae Canidae Hominidae Rana Felis Canis Ното Species Rana clamitans Felis concolor Canis familiaris Homo sapiens questions. 19462. Examine the phylogeny below, which is the phylogeny for all extant species from a genus of birds, constructed using nuclear sequences (the numbers simply label the species). 2 3 Clade A 5 6 Clade B 1 7 (a) Give two explanations for why there are more species in clade A compared to B (i.e. I want general explanations for why some clades have more species than others 4.1. What is the genetic link between Amphioxus and humans? 2. What is the significance that all species described in these films (Amphioxus, sharks, and humans) belong to the same Phylum? 3. What is the significance that sharks have the same three brain regions as humans? What is the explanation for that?
- 1. Identify traits that characterize all animals. 2. State one way that animal cells differ from the cells of plants and fungi. What is the significance of this difference? 3. State how the phylum Chordata differs from other animal phyla. 4. List three traits that evolved in invertebrate animals. 5. Describe the range of variation in the nervous systems of invertebrates. 6. Distinguish among asymmetry, radial symmetry, and bilateral symmetry.1. How does anatomical fossil evidence helps scientists connect lines of evidence for evolutionary relationships between species? Example and explanation 2 How does anatomical evidence provide clues about the ecological role a species plays in its environment? Example and explanation6. Organisms classified as “birds” share a common feature. What shared derived character defined this taxonomic group? 7. What feature is present in all animals but is not present in birds and reptiles? 8. Reptiles, birds, and mammals are amniotes. I’m addition to an amniotic egg, the common ancestor of all reptiles, birds, and mammals had a thick epidermal layer of scales partially composed of a protein called keratin. Keratinized skin helps prevent water loss in terrestrial environment. A. what type (or form) of Keratinized epidermal structure represents the ancestral character state of all reptiles, birds, and mammals?
- 1. Zoologists refer to morphological and genetic similarities in animals when investigating about their evolutionary relationships, describe how these two methods work and indicate their advantages and disadvantages (at least 2 for each method). 2. Aside from the principles of evolution, a study of the interactions of organisms with their environment is also significant in understanding Zoology. Give at least two significances of studying ecology in relation to understanding animals.9. a. What fossil primate possesses traits of both anthropoids and hominoids? b. What are those traits and how are they attributed to either anthropoids or hominoids?7. Primates have prehensile hands (and sometimes they have prehensile feet). What does this mean? OA. They have five digits on each hand and foot. B. They have nails rather than claws. C. Their hands are adapted for seizing or grasping. OD. They have an opposable thumb, which allows for a precise grip. O 17:48:40 q W SIS y U