find a chart that may help you to organize this knowledge. Concept 33.1 Sponges are basal animals that lack true tissues 1. You may have learned in an earlier course that sponges are in the phylum Porifera. This group is now known to be polyphyletic‚ and all sponges belong to either phylum Calcarea or phylum Silicea. They are the simplest animals and lack true tissues. Label the following: pores‚ spongocoel‚ epidermis‚ amoebocytes‚ choanocyte‚ flagellum‚ spicules‚ epidermis‚ and mesohyl. On this
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CHAPTER NO-5 KINGDOM ANIMALIA Phylum Porifera (GK: Porous = Pores + Ferro = form) Main characters: 1. They are commonly called as sponges. 2. They are sessile animals. 3. Sponges range in height from about 1cm to 2cm. 4. More than 5000 species of sponges are found. 5. All are marine‚ while some are fresh water. 6. The central body cavity is called spongocoel. 7. A single large opening is called as osculum. 8. They are filter feeders. 9. Body lining is formed by flagellated cells
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slowly Stage - specimens are placed here Condenser - focuses light Iris diaphragm - controls amount of light passing through the specimen TOTAL MAGNIFICATION = OCULAR MAGNIFICATION X OBJECTIVE MAGNIFICATION CLASSIFICATION Taxonomy Kingdom Phylum Class Order Family Genus Species Scientific names Binomial system uses GENUS and SPECIES names Keys 1)branching Keys these keys use a tree diagram to sort out specimens 2)Dichotomous Keys These keys use a series to pairs of questions to
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body plan and segmentation. The other hypothesis is that arthropods evolved more recently from a nematode ancestor than an annelid like ancestor because of their shared ecdysis trait. Hypothesis 1 Nematoda Annalida Arthropoda Hypothesis 2 Annalida Nematoda Arthropoda Reasoning: The morphological data that supports hypothesis one is that annelids and arthropods both have segmented bodies‚ dorsal circulatory systems‚ ventral nervous systems‚ and appendages. The morphological data that
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the Arthropod phylum. In fact‚ some scientists believe that if we were to identify all species in the tropical rain forests the ranks of Arthropod would swell to over 10 million species! Most people do not normally think of a clam‚ a jellyfish‚ or an earthworm as an animal. Yet all of them belong to the kingdom of animals. The science of classifying organisms is called taxonomy. In order to study living things‚ scientists classify each organism according to its: Kingdom Phylum Class Order Family
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this essay I will talk about two kinds of organisms that are called worms. That’s organisms use it in a labs. Which are the flatworm and the roundworms. However‚ every kind belongs to different phylum‚ so they are not closely related to each other. Flatworms ( phylum Platyhelminthes) and roundworms ( phylum Nematoda)‚ but there are many similarities and differences between these two types of organisms. Similarity: • There are many similarities between the two groups of worms‚ Platyhelminthes and
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cephalization 1.2: Unicellular and multicellular organization (Salient features with examples of phyla‚ subphyla and classes mentioned below) 1.2.1: Unicellular organization: Phylum Protozoa 1.2.2: Multicellular organization: Colonization level- Phylum Porifera 1.2.3: Multicellular organization: Division of labour (Cell diferentiation)Phylum Coelenterata 1.3 Triploblastic acoelomate and pseudocoelomate organization
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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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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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Name _______________________ Period ___________ Date ____________________ NONCOELOMATE INVERTEBRATES (CH 32) Sponges are basal animals that lack true tissues 1. Sponges are in the phylum Porifera. This group is now known to be polyphyletic‚ and all sponges belong to either phylum Calcarea or phylum Silicea. They are the simplest animals and lack true tissues. Label the following: pores‚ spongocoel‚ epidermis‚ amoebocytes‚ choanocyte‚ flagellum‚ spicules‚ epidermis‚ and mesohyl.
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