Phylum Annelida Class Clitellata Maria Erika Victoria V. Soriano Zoology Summer 2013 PHYLUM ANNELIDA ¡ The segmented worms ¡ Bilaterally symmetrical ¡ Possesses at least one pair of chitinous bristles called setae or chaetae ¡ Exhbits metamerism ¡ Epidermis secretes a protective cuticle that remains permeable to both water and gases; thus‚ annelids are restricted to moist environment ¡ Septa separates the annelid segments from each other ¡ All are very similar in appearance and strucuture
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Cnidaria Evolutionary History Diagrams of Cnidaria Life Cycle - Cnidaria The diagrams above show the general life cycle of the Cnidaria phylum. As shown above‚ the life cycle is dominated by the diploid cells as in most animals‚ while the haploid cells are only in early developmental stages. The life cycles also illustrate the change from a polyp (child) to a medusa (adult) from stage to
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Inventory of Marine Resources Delivered in Estancia Fish Port‚ Estancia‚ Iloilo A Research Problem Presented to Dr. Veminrose A. Clariza- Samuel Ph. D. In Partial Fulfillment for the Subject Aquatic Resources and Ecology By Alivar‚ Carlos P. Aledon‚ Neomar T. Babol‚ Erwin C. Bagatnan‚ Christian B. Basea‚ Princess Charmaine M. Bagatnan‚ Jessyl B. Bajande‚ Jona Mae C. Cordero‚ Lougi Donn I. Del Rosario‚ Yella M. Dolor‚ Ereca A.
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Article Summary Effects of earthworms on soil Earthworm is the common name for the largest members of Oligochaeta in the phylum Annelida. They combine bilateral symmetry and corresponding external and internal segmentation. This phylum consists of more than 17‚000 modern species of worms including earthworms‚ ragworms‚ and leeches. They are found in marine environments from tidal zones to hydrothermal vents‚ in fresh water‚ and in most terrestrial environments. They generally do not occur
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Evolution as a theory * Theory- in science‚ a well substantiated explanation of some aspect of the natural world Evolution- the accumulation of inherited genetic changes within populations over generations * Does not refer to changes that occur in an individual within its lifetime * Not limited to speciation that may only occur over long periods of time * Can occur over a few generations‚ and is most commonly expressed as an adaptation to a changing environment or the change in allele
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into about 35 phyla (Solomon et al.‚ 2011). Out of these‚ phylum Annelidia composed of about 15‚000 species which is further divided into 3 main classes – the Polychaeta (marine worms)‚ the Oligochaeta (earthworms and freshwater worms) and the Hirudinida (leeches). On the other hand‚ phylum Arthropoda is the largest animal phylum which is composed of millions of species with more than a million being described (Solomon et al.‚ 2011). This phylum is further divided into five major subgroups – subphylum
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Subject: AACB3214 Biodiversity and Ecology Experiment 7 Title: Study of Deuterostomes Aim: 1. To observe the external features of deuterostomes. 2. To study the characteristics of deuterostomes. Materials: 1. Sea urchin 2. Amphioxus 3. Dogfish 4. Caecilian 5. Lizard 6. Microscope Methods: 1. The specimen of sea urchin‚ amphioxus‚ dogfish‚ caecilian and lizard were observed. 2. The external features of specimens observed were drawn. Discussion: The Deuterostomia comprise
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elephants)‚ and Loxodonta cyclotis (African forest elephants). Their taxonomic hierarchy is as follows: Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Proboscidea Family: Elephantidae Genus: Elaphas Species: maximus Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Proboscidea Family: Elephantidae Genus: Loxodonta Species: africana Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Proboscidea Family: Elephantidae Genus: Loxodonta Species: cyclotis 2. Collect an
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Feather star is a class of echinoderms (classified in the phylum Echinodermata‚ class Crinoidea) that are attached to sea bottom by a stalk root like branches. In adult stage they break away from stalk and move freely. Feather stars have ambulacra systems that extend into the branched arms on the crown. They are most of feather stars are found in shallow‚ warm waters. Scientific classification Kingdom: Animalia Phylum: Echinodermata Subphylum: Crinozoa Class: Crinoidea Nervous
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Virtual Systematics Lab: Introduction to Systematics Worksheet Learning Goal: To learn how biologists classify species based on their evolutionary relationships. Prerequisite Knowledge: Before beginning this lab‚ you should be familiar with these concepts: why biologists today use the three-domain system of classification how evolutionary trees depict biologists’ understandings about the evolutionary relationships among groups of organisms Introduction: Almost every place on Earth‚ from the surface
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