from mesoderm - Pine Plains Central School District
... Two-sided symmetry is called bilateral symmetry Bilaterally symmetrical animals have A dorsal (top) side and a ventral (bottom) side A right and left side Anterior (front) and posterior (back) ends Many also have sensory equipment, such as a brain, concentrated in their anterior end Ra ...
... Two-sided symmetry is called bilateral symmetry Bilaterally symmetrical animals have A dorsal (top) side and a ventral (bottom) side A right and left side Anterior (front) and posterior (back) ends Many also have sensory equipment, such as a brain, concentrated in their anterior end Ra ...
Lecture Outline
... cells that perform a specialized function (e.g., nervous tissue). As mentioned above, tissue forms during the embryonic stages from one of three tissue types, endoderm, ectoderm, or mesoderm. F. A characteristic of animals with all three tissues is the presence or absence of a body cavity. The cavit ...
... cells that perform a specialized function (e.g., nervous tissue). As mentioned above, tissue forms during the embryonic stages from one of three tissue types, endoderm, ectoderm, or mesoderm. F. A characteristic of animals with all three tissues is the presence or absence of a body cavity. The cavit ...
chapter 32 - Scranton Prep Biology
... The zygote undergoesa series of mitotic divisions known as cleavage which producesa blastula in most animals. ...
... The zygote undergoesa series of mitotic divisions known as cleavage which producesa blastula in most animals. ...
Sponges and Cnidarians
... 8. Spicules are made by archaeocytes, which are specialized cells that move around within the walls of the sponge. 9. Softer sponges have an internal skeleton made of spongin. ...
... 8. Spicules are made by archaeocytes, which are specialized cells that move around within the walls of the sponge. 9. Softer sponges have an internal skeleton made of spongin. ...
BIOL 2015 – Evolution and Diversity
... important for biostratigraphy, paleoecology, and evolutionary studies because it shows a great variety of changes in form and function through time. ...
... important for biostratigraphy, paleoecology, and evolutionary studies because it shows a great variety of changes in form and function through time. ...
Flatworms, roundworms and rotifers
... there is one type of sponge that fishes for its prey ctenophores have blind ended guts nematocysts (cnidocysts) are captured from sea slugs cnidocysts evert to puncture prey and deliver their stings ...
... there is one type of sponge that fishes for its prey ctenophores have blind ended guts nematocysts (cnidocysts) are captured from sea slugs cnidocysts evert to puncture prey and deliver their stings ...
Animal Evolution –The Invertebrates
... Transition from Water to Land Vertebrates evolved in the seas, where cartilaginous and bony fishes still live Of all vertebrates, modern bony fishes are most diverse One group gave rise to aquatic tetrapods (fourlegged walkers), the descendants of which moved onto dry land ...
... Transition from Water to Land Vertebrates evolved in the seas, where cartilaginous and bony fishes still live Of all vertebrates, modern bony fishes are most diverse One group gave rise to aquatic tetrapods (fourlegged walkers), the descendants of which moved onto dry land ...
Winter 2016 Bio 94 Activity- Week 6
... 6. Think about protostomes such as annelids, mollusks, nematodes, and arthopods (e.g. insects and crustaceans) and give two examples of animals and their adaptations to one of the three challenges of living on land. ...
... 6. Think about protostomes such as annelids, mollusks, nematodes, and arthopods (e.g. insects and crustaceans) and give two examples of animals and their adaptations to one of the three challenges of living on land. ...
introduction to animal evolution outline objectives
... The animal kingdom probably originated from colonial protists related to choanoflagellates. The diversification that produced many phyla occurred in a relatively short time on the geological scale. This evolutionary episode is called the Cambrian explosion. The Cambrian explosion encompassed a 20-mi ...
... The animal kingdom probably originated from colonial protists related to choanoflagellates. The diversification that produced many phyla occurred in a relatively short time on the geological scale. This evolutionary episode is called the Cambrian explosion. The Cambrian explosion encompassed a 20-mi ...
Systematic Zoology: Invertebrates
... diversity of invertebrates furnishes a rich playing ground for all manner of biological research. From this diversity of forms, biologists have selected so-called model system species according to their special suitability for studying particular biological problems. Familiar examples include the fr ...
... diversity of invertebrates furnishes a rich playing ground for all manner of biological research. From this diversity of forms, biologists have selected so-called model system species according to their special suitability for studying particular biological problems. Familiar examples include the fr ...
3. Evolution of a body cavity
... • 1. Allows redundant organ systems in adults such as occurs in the annelids • 2. Allows for more efficient and flexible movement because each segment can move independently ...
... • 1. Allows redundant organ systems in adults such as occurs in the annelids • 2. Allows for more efficient and flexible movement because each segment can move independently ...
animal diversity 25
... organization of embryonic cell layers. • Compare and contrast asymmetry, radial symmetry, and bilateral symmetry. • Differentiate among acoelomate, pseudocoelomate, and coelomate organisms; indicate how they are evolutionarily related and give examples of each. ...
... organization of embryonic cell layers. • Compare and contrast asymmetry, radial symmetry, and bilateral symmetry. • Differentiate among acoelomate, pseudocoelomate, and coelomate organisms; indicate how they are evolutionarily related and give examples of each. ...
OHSU Presentation Template
... • consideration only bw and surface area may be inadequate • other considerations: age, sex cohousing use (production? experimentation?) special needs (e.g., vertical space for arboreal species) • performance indices should be considered • (these are) “considered the minimum for animals hous ...
... • consideration only bw and surface area may be inadequate • other considerations: age, sex cohousing use (production? experimentation?) special needs (e.g., vertical space for arboreal species) • performance indices should be considered • (these are) “considered the minimum for animals hous ...
Animal Science - Oklahoma Department of Career and Technology
... a student trained to the skills standards is equally employable in local, state and national job markets. Curriculum materials and textbooks contain information and activities that teach students the knowledge and skills outlined in the skills standards. In addition to complementing classroom instru ...
... a student trained to the skills standards is equally employable in local, state and national job markets. Curriculum materials and textbooks contain information and activities that teach students the knowledge and skills outlined in the skills standards. In addition to complementing classroom instru ...
Section 29–1 Invertebrate Evolution (pages 745–750)
... that compare these groups of invertebrates: (1) cnidarians and roundworms, (2) annelids and mollusks, and (3) arthropods and echinoderms. Use the table in Figure 29–5 for the information to be contained in your diagrams. For more information about Venn diagrams, see Organizing Information in Appendi ...
... that compare these groups of invertebrates: (1) cnidarians and roundworms, (2) annelids and mollusks, and (3) arthropods and echinoderms. Use the table in Figure 29–5 for the information to be contained in your diagrams. For more information about Venn diagrams, see Organizing Information in Appendi ...
Official Identification for Sheep and Goats
... • Begins with state abbreviation; eight characters total, last four or five are numerical • Available in plastic or metal ...
... • Begins with state abbreviation; eight characters total, last four or five are numerical • Available in plastic or metal ...
Invisible Garden microscope activity teachers notes
... forms are usually completely focussed on feeding, whereas the adults are focussed on mating and (if female) laying eggs. This also means that the adults and young often occur in different spaces and do not compete for food. The most well-known case of metamorphosis is the very hungry caterpillar. Th ...
... forms are usually completely focussed on feeding, whereas the adults are focussed on mating and (if female) laying eggs. This also means that the adults and young often occur in different spaces and do not compete for food. The most well-known case of metamorphosis is the very hungry caterpillar. Th ...
Animal Diversity PPT
... years ago) marks the earliest fossil appearance of many major groups of living animals • There are several hypotheses regarding the cause of the Cambrian explosion and decline of Ediacaran biota – New predator-prey relationships – A rise in atmospheric oxygen – The evolution of the Hox gene complex ...
... years ago) marks the earliest fossil appearance of many major groups of living animals • There are several hypotheses regarding the cause of the Cambrian explosion and decline of Ediacaran biota – New predator-prey relationships – A rise in atmospheric oxygen – The evolution of the Hox gene complex ...
AmphibianTalkingPoin..
... • “Amphibian” has Greek origins and means “double life”; most amphibians undergo complete metamorphosis; a change occurs from the larval or tadpole state into adult form. • Amphibian eggs do not have a hard shell coating so they must lay their eggs in or near water. • Amphibians are ectothermic; the ...
... • “Amphibian” has Greek origins and means “double life”; most amphibians undergo complete metamorphosis; a change occurs from the larval or tadpole state into adult form. • Amphibian eggs do not have a hard shell coating so they must lay their eggs in or near water. • Amphibians are ectothermic; the ...
BSc_ ZOOA_Part-I
... -Torsions in Gastropods (Pechenik, p217-218) -Cyclomorphosis in Rotifers (Pechenik, p194-195) -Excretion in invertebrates with special reference to flame cells, nephridia, coelomoducts and malpighian tubules (in chapters on Platyhelminths, Annelids, Arthropods in Rupert et al. and in Pechenik) -Gas ...
... -Torsions in Gastropods (Pechenik, p217-218) -Cyclomorphosis in Rotifers (Pechenik, p194-195) -Excretion in invertebrates with special reference to flame cells, nephridia, coelomoducts and malpighian tubules (in chapters on Platyhelminths, Annelids, Arthropods in Rupert et al. and in Pechenik) -Gas ...
BIOL212test2keyMAY2012
... I.e. esophagus, stomach, intestines, with more differentiation in many classes. ...
... I.e. esophagus, stomach, intestines, with more differentiation in many classes. ...
Study Guide Evolution of Animals Chapters 32-35
... filled sac and protects embryo from desiccation (drying up) on land. This eliminated the need of ...
... filled sac and protects embryo from desiccation (drying up) on land. This eliminated the need of ...
04 Chapter
... adult birds their stream-lined shape and coloring. • Outer contour feathers help a bird move through the air or water. • Birds have down feathers that trap and keep warm air next to their bodies. These fluffy feathers provide an insulating layer under the contour feathers of adult birds and cover th ...
... adult birds their stream-lined shape and coloring. • Outer contour feathers help a bird move through the air or water. • Birds have down feathers that trap and keep warm air next to their bodies. These fluffy feathers provide an insulating layer under the contour feathers of adult birds and cover th ...
Animal coloration
Animal coloration is the general appearance of an animal resulting from the reflection or emission of light from its surfaces. Some animals are brightly coloured, while others are hard to see. In some species, such as the peacock, the male has strong patterns, conspicuous colours and is iridescent, while the female is far less visible.There are several separate reasons why animals have evolved colours. Camouflage enables an animal to remain hidden from view. Signalling enables an animal to communicate information such as warning of its ability to defend itself (aposematism). Animals also use colour in advertising, signalling services such as cleaning to animals of other species; to signal sexual status to other members of the same species; and in mimicry, taking advantage of another species' warning coloration. Some animals use colour to divert attacks by startle (deimatic behaviour), surprising a predator e.g. with eyespots or other flashes of colour, and possibly by motion dazzle, confusing a predator's attack by moving a bold pattern (such as zebra stripes) rapidly. Some animals are coloured for physical protection, such as having pigments in the skin to protect against sunburn, while some frogs can lighten or darken their skin for temperature regulation. Finally, animals can be coloured incidentally. For example, blood is red because the haem pigment needed to carry oxygen is red. Animals coloured in these ways can have striking natural patterns.Animals produce colour in different ways. Pigments are particles of coloured material. Chromatophores are cells containing pigment, which can change their size to make their colour more or less visible. Some animals, including many butterflies and birds, have microscopic structures in scales, bristles or feathers which give them brilliant iridescent colours. Other animals including squid and some deep-sea fish can produce light, sometimes of different colours. Animals often use two or more of these mechanisms together to produce the colours and effects they need.