Cnidarians Cnidaria is a phylum containing some 11‚000 species of simple animals found exclusively in aquatic‚ mostly marine‚ environments. Cnidarians get their name from cnidocytes‚ which are special cells that carry stinging organelles. The corals‚ which are important reefbuilders‚ belong here‚ as do the sea anemones‚ jellyfish‚ sea pens‚ sea pansies and sea wasps. The names Coelenterata and Coelentera were once applied to the group‚ but those names included the Ctenophores‚comb jellies
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waters around the earth.It has verey dangreouse teticlaes that are 10 Feet long. scyphozoa Scyphozoa is a jellyfish Shaped like a upside down cup.The Scyphozoa are an exclusively marine class of the phylum Cnidaria referred to as the true jellyfish It includes Conulariids. Cnidaria meaning Cnidaria
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Kathlynn Constiner GS102 Introduction to Life Science Week 7 Assignment The Earth’s largest phylum is Arthropoda‚ including centipedes‚ millipedes‚ crustaceans‚ and insects. Insects are the largest and most successful class of animals on Earth. This success‚ zoologists believe‚ is attributed from certain biological traits such as their small size or ability to fly for some (Postlethwait & Hopson‚ 2010). The exoskeleton of most insects supports them inside but also protects them from outside. John
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ION OF CLASSIFICATION OF NON-CHORDATES UPTO CLASSES WITH SALIENT FEATURES Vanramliana Pachhunga University College Aizawl‚ Mizoram 1. Phylum Porifera: From the Latin porus for pore and Ferre to bear‚ hence an animal with with pores. ~5000 species. Characteristic features:- a) Multicellular; no true tissue; asymmetric; sessile b) spongin- protein fibers for structure; spicules for skeleton c) filter feeders using collar cells (choanocytes) & amoebocytes
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branch turned into organisms which were asymmetrical‚ with no true tissue layers and no gut although it has two cell layers – the inner layers consists of collar cells and between the cell layers a jelly-like layer‚ containing tiny spikes‚ is found – (Phylum Porifera)‚ whilst the other started to develop true tissues. Multicellular tissue organism‚ second branch from the ancestral stock‚ differentiated further to become two layered and three layered organisms. Those multicellular organisms which
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its meal. Historically‚ the hydrozoans have been divided into a number of orders‚ according to the way they grow and reproduce. (4) “Hydrozoans or “water animals” belong to the phylum Cnidaria. Cnidaria‚ which means “stinging thread” contain over 10‚000 species‚ 3200 of them belonging to class Hydrozoa. This phylum includes things such as Sea Anemones‚ Jellyfish‚ and Corals to sum it up. They are similar in that they possess radial symmetry‚ and all possess nematocysts that sting‚ which is mostly
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PLATYHELMINTHES About Platyhelminthes Platyhelminthes are an ancient phylum and there is little information into how it evolved. Their evolutionary history remains unknown because soft-bodied organisms do not fossilize well. Scientists believe that the first flatworm began to evolve 550 years ago. Platyhelminthes otherwise known as “flatworms” have a wide variety of species within the phylum and have positive and negative effects on those who interact with them. Some examples of Platyhelminthes
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Q.5. Describe five kingdom classification Margulus and schwartz. OR Describe the structure and characteristics of Virus. OR Write four common characteristics of the following. Phylum Protozoa Phylum Porifera Phylum Coelenterata Phylum Annelida Phylum Mollusca Phylum Echinodermata Phylum Arthropoda OR Write four common characteristics of the following Class Pisces www.moalims.com www.moalims.com Amphibia Reptilia Aves Mammalia Q.6. Write down four functions
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Phylum Porifera  Basic Characteristics No definine symmetry Bodies are multicellular‚ with few tissue and no organs. The cells and tissues surround a water filled space but there is no body cavity. Has no nervous system Has a larval stage. Are all filter feeders. Sponges are among the oldest animals‚ being discovered about 500 million years ago! Phylum Cnidaria JellyFish  Basic Characteristics Live in both fresh water‚ and salt water. Radial Symmetry; typically quadramous
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knowledge about the origin of chordates it has come to conclusion that there are many similarities and common ancestry brought into play about the origin of chordates. Chordates aren’t a development of its own species but it is a development of different phylums such as the echinoderm‚ the cephalochordate‚ hemichordates‚ pogonophorans. Chordates evolved from some deuterostome ancestor as they have similarities in embryonic development‚ type of coelom and larval stages. Another interesting fact that I learned
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