Animals #1 Practice Test
... 41. Depending on the phylum, the _____________________ develops into either the mouth or the anus of an animal. 42. The fact that appendages appear in several different vertebrate and invertebrate phyla indicates that the formation of ________________________ has evolved more than once. 43. ________ ...
... 41. Depending on the phylum, the _____________________ develops into either the mouth or the anus of an animal. 42. The fact that appendages appear in several different vertebrate and invertebrate phyla indicates that the formation of ________________________ has evolved more than once. 43. ________ ...
View more Animal Life videos
... Mammalia Class: Endotherms with hair or fur. mammary glands produce milk. glandular skin with hair or fur. external ear present. teeth are different types. diaphragm between thorax/abdomen ...
... Mammalia Class: Endotherms with hair or fur. mammary glands produce milk. glandular skin with hair or fur. external ear present. teeth are different types. diaphragm between thorax/abdomen ...
Mollusks, Arthropods, and Echinoderms
... Phylum Arthropoda: Jointed Legs • Characteristics: – Largest group of animals with over 1 million species known. That number may be as high as 10 million. ...
... Phylum Arthropoda: Jointed Legs • Characteristics: – Largest group of animals with over 1 million species known. That number may be as high as 10 million. ...
Section 1 Sponges
... in their lives, sponges attach themselves firmly to the sea bottom or some other submerged surface, like a rock or coral reef. They remain there for life. Sponges can have a diameter as small as 1 cm (0.4 in.) or as large as 2 m (6.6 ft). Most sponges are bag-shaped and have a large internal cavity. ...
... in their lives, sponges attach themselves firmly to the sea bottom or some other submerged surface, like a rock or coral reef. They remain there for life. Sponges can have a diameter as small as 1 cm (0.4 in.) or as large as 2 m (6.6 ft). Most sponges are bag-shaped and have a large internal cavity. ...
BIO102 - National Open University of Nigeria
... the specific objectives for each unit at the beginning of that unit. This will help you to ensure that you achieve the objectives. As you go through each unit, you should from time to time go back to these objectives to ascertain the level at which you have progressed. By the time you have finished ...
... the specific objectives for each unit at the beginning of that unit. This will help you to ensure that you achieve the objectives. As you go through each unit, you should from time to time go back to these objectives to ascertain the level at which you have progressed. By the time you have finished ...
Field identification guide to Heard Island and McDonald
... invertebrate surveys over the past seven years have now revealed more than 500 species, many of which are endemic. This is an essential reference guide to these species. Illustrated with hundreds of representative photographs, it includes brief narratives on the biology and ecology of the major taxo ...
... invertebrate surveys over the past seven years have now revealed more than 500 species, many of which are endemic. This is an essential reference guide to these species. Illustrated with hundreds of representative photographs, it includes brief narratives on the biology and ecology of the major taxo ...
Chapter 25: Worms and Mollusks
... Cestodes All tapeworms are members of class Cestoda—the cestodes. They are parasites adapted to life in the intestines of their hosts. Look at the anterior end, or head, of the tapeworm in Figure 25.6. This is the scolex (SKOH leks), a knob-shaped structure with hooks and suckers that attach to the ...
... Cestodes All tapeworms are members of class Cestoda—the cestodes. They are parasites adapted to life in the intestines of their hosts. Look at the anterior end, or head, of the tapeworm in Figure 25.6. This is the scolex (SKOH leks), a knob-shaped structure with hooks and suckers that attach to the ...
Origin
... typical state, they also show some primitive features of nonChordates, such as, absence of heart, head, sense organs, respiratory pigment, filter-feeding mode of food capture and excretion by solenocytes. The current consensus is that Chordates are monophyletic, meaning that the chordata contains th ...
... typical state, they also show some primitive features of nonChordates, such as, absence of heart, head, sense organs, respiratory pigment, filter-feeding mode of food capture and excretion by solenocytes. The current consensus is that Chordates are monophyletic, meaning that the chordata contains th ...
Document
... Most of the 5000 or more sponge species are marine, although some 150 species live in fresh water. Marine sponges are abundant in all seas and at all depths, and a few even exist in brackish water.Although their embryos are free swimming,adults are always attached, usually to rocks, shells, corals, ...
... Most of the 5000 or more sponge species are marine, although some 150 species live in fresh water. Marine sponges are abundant in all seas and at all depths, and a few even exist in brackish water.Although their embryos are free swimming,adults are always attached, usually to rocks, shells, corals, ...
MB_32_win
... • In most fish and amphibian species, eggs and sperm are released directly into the water, where fertilization takes place. • In reptiles, birds, and mammals, the egg and sperm unite within the body of the female. • The fertilized eggs of many fishes, amphibians, reptiles, and birds develop outside ...
... • In most fish and amphibian species, eggs and sperm are released directly into the water, where fertilization takes place. • In reptiles, birds, and mammals, the egg and sperm unite within the body of the female. • The fertilized eggs of many fishes, amphibians, reptiles, and birds develop outside ...
Echinoderms and Invertebrate Chordates
... Oxygen diffuses from the water through the thin membranes of the tube feet. Circulation takes place in the body coelom and the water-vascular system. ...
... Oxygen diffuses from the water through the thin membranes of the tube feet. Circulation takes place in the body coelom and the water-vascular system. ...
Invertebrate Chordate Notes
... • Homeotic genes specify body organization and direct the development of tissues and organs in an embryo. • Studies of chordate homeotic genes have helped scientists understand the process of development and the relationship of invertebrate chordates to vertebrate chordates. ...
... • Homeotic genes specify body organization and direct the development of tissues and organs in an embryo. • Studies of chordate homeotic genes have helped scientists understand the process of development and the relationship of invertebrate chordates to vertebrate chordates. ...
Chapter 25 Worms and Mollusks
... also are removed from flatworm cells by diffusion. Unlike sponges and cnidarians, flatworms have an excretory system that consists of a network of small tubes that run through the body. On side branches of the tubes, as shown in Figure 25.2, bulblike flame cells lined with cilia sweep water and excr ...
... also are removed from flatworm cells by diffusion. Unlike sponges and cnidarians, flatworms have an excretory system that consists of a network of small tubes that run through the body. On side branches of the tubes, as shown in Figure 25.2, bulblike flame cells lined with cilia sweep water and excr ...
Vertebrate$`Relationships
... A popular and long-held theory was that the earli est chordates would have been like tunicates (sessile as adults), and then cephalochbrdates and vertebrates evolved from an ancestor that resembled a tunicate larva (see Lacalli 2004 for a review). However, it now seems more likely that those tunica ...
... A popular and long-held theory was that the earli est chordates would have been like tunicates (sessile as adults), and then cephalochbrdates and vertebrates evolved from an ancestor that resembled a tunicate larva (see Lacalli 2004 for a review). However, it now seems more likely that those tunica ...
25.1 Flatworms
... There are three main classes of flatworms: Turbellaria (tur buh LER ee uh), Trematoda (trem uh TOH duh), and Cestoda (ses TOH duh). Class Turbellaria consists of the free-living flatworms. Class Trematoda and class Cestoda consist of parasitic flatworms. Turbellarians Members of the class Turbellari ...
... There are three main classes of flatworms: Turbellaria (tur buh LER ee uh), Trematoda (trem uh TOH duh), and Cestoda (ses TOH duh). Class Turbellaria consists of the free-living flatworms. Class Trematoda and class Cestoda consist of parasitic flatworms. Turbellarians Members of the class Turbellari ...
Sample PDF
... and characters of chordates. Then it deals with Protochordata, but it does not take into account the Hemichordata. The Hemichordata in modern zoological literature are now regarded as a separate phylum of invertebrates. Then the Agnatha are described in outline. The next part is a comprehensive acco ...
... and characters of chordates. Then it deals with Protochordata, but it does not take into account the Hemichordata. The Hemichordata in modern zoological literature are now regarded as a separate phylum of invertebrates. Then the Agnatha are described in outline. The next part is a comprehensive acco ...
document
... round, like spaghetti. Like other worms, they have bilateral symmetry. • Roundworms have a simple nervous system. A ring of ganglia forms a simple brain. Parallel nerve cords connect the two ends of their body. • Some round worms eat dead tissue. Many roundworms are parasites. Chapter menu ...
... round, like spaghetti. Like other worms, they have bilateral symmetry. • Roundworms have a simple nervous system. A ring of ganglia forms a simple brain. Parallel nerve cords connect the two ends of their body. • Some round worms eat dead tissue. Many roundworms are parasites. Chapter menu ...
Multiple Choice, continued - Cardinal Newman High School
... • In most fish and amphibian species, eggs and sperm are released directly into the water, where fertilization takes place. • In reptiles, birds, and mammals, the egg and sperm unite within the body of the female. • The fertilized eggs of many fishes, amphibians, reptiles, and birds develop outside ...
... • In most fish and amphibian species, eggs and sperm are released directly into the water, where fertilization takes place. • In reptiles, birds, and mammals, the egg and sperm unite within the body of the female. • The fertilized eggs of many fishes, amphibians, reptiles, and birds develop outside ...
Topic 8 Lophotrochozoan "Minor" Phyla
... The change in behavior appears to be caused by the Acanthocephalan pumping a serotoninboosting molecule into the Gammarus’ brain. This causes the Gammarus to think it’s having sex and cling as it would if mating. Interestingly, the parasite’s manipulation also causes female Gammarus to mimic the mal ...
... The change in behavior appears to be caused by the Acanthocephalan pumping a serotoninboosting molecule into the Gammarus’ brain. This causes the Gammarus to think it’s having sex and cling as it would if mating. Interestingly, the parasite’s manipulation also causes female Gammarus to mimic the mal ...
Invertebrate Chordates
... main features of chordates. Recall that vertebrates are animals with backbones. Most chordates are vertebrates. Invertebrate chordates, which belong to two of the subphyla of chordates—Cephalochordata and Urochordata, also have a dorsal tubular nerve cord, a notochord, pharyngeal pouches, a postanal ...
... main features of chordates. Recall that vertebrates are animals with backbones. Most chordates are vertebrates. Invertebrate chordates, which belong to two of the subphyla of chordates—Cephalochordata and Urochordata, also have a dorsal tubular nerve cord, a notochord, pharyngeal pouches, a postanal ...
Classification of Animals
... – Read the article on the desk and answer this question. Use at least 2 pieces of evidence to support your answer. – If peeing on the sting is not effective, what should you do instead? ...
... – Read the article on the desk and answer this question. Use at least 2 pieces of evidence to support your answer. – If peeing on the sting is not effective, what should you do instead? ...
III. Photoreceptors in Protostomes
... •Tiny spherical lenses 100 um wide form sharp images free of spherical aberrations (better peripheral imaging) • However the focal plane lies behind the retina thus the image perceived is blurry. ...
... •Tiny spherical lenses 100 um wide form sharp images free of spherical aberrations (better peripheral imaging) • However the focal plane lies behind the retina thus the image perceived is blurry. ...
Biology of Sponges video/DVD guide.
... When the molecular sequences of a variety of protist groups were also compared to animal sequences, the data showed clearly that one group - choanoflagellates - was also in the same line of evolution. In other words, ancestors of modern choanoflagellates were most likely also the ancestors of sponge ...
... When the molecular sequences of a variety of protist groups were also compared to animal sequences, the data showed clearly that one group - choanoflagellates - was also in the same line of evolution. In other words, ancestors of modern choanoflagellates were most likely also the ancestors of sponge ...
Section 28–1 Introduction to the Arthropods
... 17. Circle the letter of each sentence that is true about the response to the environment by arthropods. a. Most arthropods have sophisticated sense organs. b. All arthropods have a brain. c. Ganglia along a ventral nerve cord coordinate the movements of individual legs. d. Very few arthropods have ...
... 17. Circle the letter of each sentence that is true about the response to the environment by arthropods. a. Most arthropods have sophisticated sense organs. b. All arthropods have a brain. c. Ganglia along a ventral nerve cord coordinate the movements of individual legs. d. Very few arthropods have ...
Invertebrate
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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.