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... • The most well-known annelids are earthworms. They have a definite anterior, or front end, and a posterior, or back end. • Earthworms have more than 100 body segments. The segments can be seen on the outside and the inside of the body cavity. • Each body segment, except for the first and last segme ...
... • The most well-known annelids are earthworms. They have a definite anterior, or front end, and a posterior, or back end. • Earthworms have more than 100 body segments. The segments can be seen on the outside and the inside of the body cavity. • Each body segment, except for the first and last segme ...
Phylum Porifera
... then enters pores of sponge B. Fertilization occurs inside of sponge B (amoebocyte carries sperm to egg). Flagellated larvae develop and leave by the osculum. They drift off and settle elsewhere. ...
... then enters pores of sponge B. Fertilization occurs inside of sponge B (amoebocyte carries sperm to egg). Flagellated larvae develop and leave by the osculum. They drift off and settle elsewhere. ...
Mollusks, Worms, Arthropods, Echinoderms
... washing them away. Scallops, shown in Figure 3, escape predators by rapidly opening and closing their shells. As water is forced out, the scallop moves rapidly in the opposite direction. ...
... washing them away. Scallops, shown in Figure 3, escape predators by rapidly opening and closing their shells. As water is forced out, the scallop moves rapidly in the opposite direction. ...
The Evolutionary Emergence of Vertebrates From Among Their
... group have evolved from a common ancestor that they all share. This means that the deeper parts of our evolutionary history are entwined with the origin of the clade, and it should thus come as no surprise to discover, therefore, that the origin of vertebrates has been the subject of intense debate ...
... group have evolved from a common ancestor that they all share. This means that the deeper parts of our evolutionary history are entwined with the origin of the clade, and it should thus come as no surprise to discover, therefore, that the origin of vertebrates has been the subject of intense debate ...
CHAPTER 7 Mollusks, Worms, Arthropods, Echinoderms
... washing them away. Scallops, shown in Figure 3, escape predators by rapidly opening and closing their shells. As water is forced out, the scallop moves rapidly in the opposite direction. ...
... washing them away. Scallops, shown in Figure 3, escape predators by rapidly opening and closing their shells. As water is forced out, the scallop moves rapidly in the opposite direction. ...
Worms and Mollusks
... • Phylum Nematoda • No segments • Many free-living, some Parasitic • Pseudocoelomate: 3 germ layers with false cavity(coelom) • Digestive system with two openings: mouth and anus • Inhabit the soil, salt flats, aquatic sediments and water from polar regions to the tropics • Hookworms, trichinella, a ...
... • Phylum Nematoda • No segments • Many free-living, some Parasitic • Pseudocoelomate: 3 germ layers with false cavity(coelom) • Digestive system with two openings: mouth and anus • Inhabit the soil, salt flats, aquatic sediments and water from polar regions to the tropics • Hookworms, trichinella, a ...
F. Y. B. Sc. Zoology
... 3. 1 General organization, habits and habitat. 3.2 Classification with major characters of the following Subphyla (one example each): Opalinata,Ciliophora, Sarcodina, Dinophyta and Euglenophyta 3.3 Study of Paramoecium with respect to: habits, habitat, Structure, nutrition, excretion and reproductio ...
... 3. 1 General organization, habits and habitat. 3.2 Classification with major characters of the following Subphyla (one example each): Opalinata,Ciliophora, Sarcodina, Dinophyta and Euglenophyta 3.3 Study of Paramoecium with respect to: habits, habitat, Structure, nutrition, excretion and reproductio ...
The Kingdom Animalia
... others for nutrition and still others differentiated into gametes. These coordinated groups of cells evolved into larger and more complex organisms that we now call animals. Multicellular animals have arisen from the protists at least three times. The sponges (phylum Porifera), cnidarians (phylum Cn ...
... others for nutrition and still others differentiated into gametes. These coordinated groups of cells evolved into larger and more complex organisms that we now call animals. Multicellular animals have arisen from the protists at least three times. The sponges (phylum Porifera), cnidarians (phylum Cn ...
File
... Arthropods reproduce sexually • Some species, including bees, ants, aphids, and wasps, exhibit parthenogenesis, a form of asexual reproduction in which a new individual develops from an unfertilized egg. • Reproductive diversity is one reason there are more arthropod species than all other animal s ...
... Arthropods reproduce sexually • Some species, including bees, ants, aphids, and wasps, exhibit parthenogenesis, a form of asexual reproduction in which a new individual develops from an unfertilized egg. • Reproductive diversity is one reason there are more arthropod species than all other animal s ...
Platyhelminthes
... animals to have 3 embryonic germ layers, bilateral symmetry, and cephalization. The three embryonic germ layers include ectoderm, endoderm, and mesoderm. ...
... animals to have 3 embryonic germ layers, bilateral symmetry, and cephalization. The three embryonic germ layers include ectoderm, endoderm, and mesoderm. ...
Ch. 18 The Evolution of Animal Diversity (Lecture Notes)
... [than the radiate animals] and a new body organization. The ... acoelomate phyla considered [here] are not greatly advanced in organization over the Radiata except in symmetry. The evolutionary consequence of that advancement alone was enormous, however, for it is the type of symmetry assumed by all ...
... [than the radiate animals] and a new body organization. The ... acoelomate phyla considered [here] are not greatly advanced in organization over the Radiata except in symmetry. The evolutionary consequence of that advancement alone was enormous, however, for it is the type of symmetry assumed by all ...
sponge fact sheet - World Animal Foundation
... All sponges are sessile (they are not able to move about) and aquatic animals. Although there are freshwater species, the great majority are marine (salt water) species, ranging from tidal zones to depths exceeding 5.5 miles. Most sponges live their lives attached to a reef. Sponges are similar to o ...
... All sponges are sessile (they are not able to move about) and aquatic animals. Although there are freshwater species, the great majority are marine (salt water) species, ranging from tidal zones to depths exceeding 5.5 miles. Most sponges live their lives attached to a reef. Sponges are similar to o ...
28.1 Evolution of Animals
... The skeleton of a sponge prevents the body from collapsing. All sponges have fibers of spongin, a modified form of collagen; a bath sponge is the dried spongin skeleton from which all living tissue has been removed. Today, however, commercial “sponges” are usually synthetic. Typically, the endoskele ...
... The skeleton of a sponge prevents the body from collapsing. All sponges have fibers of spongin, a modified form of collagen; a bath sponge is the dried spongin skeleton from which all living tissue has been removed. Today, however, commercial “sponges” are usually synthetic. Typically, the endoskele ...
09 Introduction to Animals
... 2. Give an example of a human adaptation. Explain how it helps people survive and reproduce. Classify the adaptation as structural, behavioral, or functional. ...
... 2. Give an example of a human adaptation. Explain how it helps people survive and reproduce. Classify the adaptation as structural, behavioral, or functional. ...
AP Biology Survey of the Kingdoms CHAPTER 27 – Bacteria and
... 7. Gram stains are often performed in medical labs, generally what are the differences in the effects Gram positive and Gram negative bacteria have on the human body? ___________________________________________ _______________________________________________________________________________________ ...
... 7. Gram stains are often performed in medical labs, generally what are the differences in the effects Gram positive and Gram negative bacteria have on the human body? ___________________________________________ _______________________________________________________________________________________ ...
Unit 19.1: Overview of Vertebrates
... • Vertebrates have a closed circulatory system with a heart. Blood is completely contained within blood vessels that carry the blood throughout the body. The heart is divided into chambers that work together to pump blood. There are between two and four chambers in the vertebrate heart. With more ch ...
... • Vertebrates have a closed circulatory system with a heart. Blood is completely contained within blood vessels that carry the blood throughout the body. The heart is divided into chambers that work together to pump blood. There are between two and four chambers in the vertebrate heart. With more ch ...
CLASSIFICATION
... dichotomous key (pronounced ‘dye-COTo-muss’) because the branches always split into two (di = ‘two’). Scientists use this type of key to make simple ‘yes’ or ‘no’ decisions at each branch. For example, does the animal have fur (yes/no)? Does it have scales (yes/no)? Each answer leads to another bran ...
... dichotomous key (pronounced ‘dye-COTo-muss’) because the branches always split into two (di = ‘two’). Scientists use this type of key to make simple ‘yes’ or ‘no’ decisions at each branch. For example, does the animal have fur (yes/no)? Does it have scales (yes/no)? Each answer leads to another bran ...
Arthropods - walker2013
... Insects usually mate once during a lifetime Some insects exhibit parthenogenesis Most insects lay a large number of eggs, which increase the chances that some offspring will survive long enough to ...
... Insects usually mate once during a lifetime Some insects exhibit parthenogenesis Most insects lay a large number of eggs, which increase the chances that some offspring will survive long enough to ...
3 Sponges, Cnidarians, Worms, and Mollusks
... the roundworm. It allows digestion to happen in orderly stages— from breaking down food to eliminating wastes. This enables the animal’s body to absorb much of the needed substances in foods. Segmented Worms Earthworms, leeches and some sea-floor worms are segmented worms. Segmented worms have bodie ...
... the roundworm. It allows digestion to happen in orderly stages— from breaking down food to eliminating wastes. This enables the animal’s body to absorb much of the needed substances in foods. Segmented Worms Earthworms, leeches and some sea-floor worms are segmented worms. Segmented worms have bodie ...
COVENANT UNIVERSITY COLLEGE OF
... INTRODUCTION TO PHYLUM CHORDATA The Phylum Chordata includes the well-known vertebrates (fishes, ...
... INTRODUCTION TO PHYLUM CHORDATA The Phylum Chordata includes the well-known vertebrates (fishes, ...
Invertebrate Identification Guide
... often has black and yellow marks on body, imitating a wasp ...
... often has black and yellow marks on body, imitating a wasp ...
Cnidaria: Introduction
... is divided by sheets of tissue radiating from the body wall (mesenteries), some or all of which connect to the actinopharynx. A bilaterality in symmetry is due to the actinopharynx typically being ovoid rather than circular in cross-section, and the mesenteries of an individual not being all ident ...
... is divided by sheets of tissue radiating from the body wall (mesenteries), some or all of which connect to the actinopharynx. A bilaterality in symmetry is due to the actinopharynx typically being ovoid rather than circular in cross-section, and the mesenteries of an individual not being all ident ...
Invertebrate
Invertebrates are animals that neither possess nor develop a vertebrae (vertebral column) , derived from the notochord. This includes all animals apart from the subphylum Vertebrata. Familiar examples of invertebrates include insects, crabs, lobsters and their kin, snails, clams, octopuses and their kin, starfish, sea-urchins and their kin, and worms.The majority of animal species are invertebrates. One estimate puts the figure at 97%. Many invertebrate taxa have a greater number and variety of species than the entire subphylum of Vertebrata.Some of the so-called invertebrates, such as the Chaetognatha, Hemichordata, Tunicata and Cephalochordata are more closely related to the vertebrates than to other invertebrates. This makes the term ""invertebrate"" almost meaningless for taxonomic purposes.