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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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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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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Introduction to B I O L O G I C A L S C I E N C E A Simplified Approach 05.29.2013 RICHARD M. ADRIANO‚ RN 0261849 ------------------------------------------------- NATURAL SCIENCE 1 CHAPTER 1 INTRODUCTION TO BIOLOGICAL SCIENCE Biological science is the study of living things. In this context we may ask: What are living things? We humans‚ ourselves are living things. How do living things differ from non-living things? To answer these questions‚ we must first define the word life
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perfect casts. (Glaessner 67)<br><br>The nature of these soft-bodied fossils justifies the characterization of the Precambrian as the "age of the jellyfish‚" however the term jellyfish only refers to a number of diverse forms‚ which belong to the Phylum Cnideria.
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