Chapter 28 Reading Questions Invertebrate Evolution 1. State three characteristics that all animals have in common. 1- multicellular 2- ingest food 3-diploid life cycle 2. Explain the colonial flagellate hypothesis about the origin of animals. They are decended from an ancestor that resembles a hollow spherical colony of flagellated cells. Individual cells became specialized for reproduction. Two tissue layers arose by invagination. 3. Describe the different types of symmetry. Asymmetrical-
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ecosystem‚ located on the southern shores of Botany Bay at Kurnell. Towra point is constructed from sea grass‚ salt marsh vegetation and mangrove. It is a major breeding ground for many vulnerable‚ protected and endangered species. Such as mammals‚ crustaceans fish and birds. Presently‚ the Federal Government as well as several additional international agreements protects it. The atmosphere is the envelope of gases that border the Earth. Atmospheric elements consist of temperature‚ wind‚ humidity
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met her dream crab‚ a ten-legged green caped crab. They fell in love and had a beautiful crab wedding. The Generation one crustacean body’s phenotype was a plastic cup while the genotype was BB. The legs’ phenotypes were pearly white pipe cleaners and the genotype was ff. The crustacean had deep blue pom poms for eyes and the genotype was Ii. For antennae‚ the crustacean had soft qtips and the genotypes were Kk. One of Joy’s structural adaptations were vibrant purple stripes to help the crab camouflage
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freshwater crustacean from the branchiopod class that is common to most ponds‚ lakes‚ pools‚ streams and springs around the world. The water flea‚ as it is sometimes referred to‚ is very small in size growing to a length of less than ¼ inch‚ it has a flat back‚ a rounded belly‚ black round eyes and a pair of antennae (Kindersley‚ 2006). The Daphnia have leaf-like appendages used in respiration‚ filter feeding and locomotion (Miller‚ 2010). Unfortunately‚ due to the size of these crustaceans they are
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The goal of this project is to test whether alcohol and caffeine has an effect on heart rate‚ using the freshwater crustacean‚ Daphnia magna‚ as the experimental subject. For humans‚ alcohol works as a depressant‚ slowing down the heart rate of the consumer; caffeine works as a stimulant‚ increasing the heart rate of the consumer. The heart depends on an internal pacemaker system to keep it pumping consistently and at the right speed. Alcohol disturbs this pacemaker system and causes the heart
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Introduction: Crayfish also known as Procambarus clariia are classified as a decapod crustaceans related to lobsters‚ crabs‚ and shrimp. They breathe through the gills as they are aquatic animals but they can survive for short time outside the water. They have a hard‚ calcified exoskeleton that must be shed as they grow. In front of the first abdominal segment locates crayfish heart in the dorsal portion of cephalothorax. Crayfish are poikilothermic as their internal temperature is proportional
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(2005)‚ this carnivorous sponge was discovered during the DIVA-1 EXPEDITION OF RV ‘METEOR’ along the Angola Basin. The Demospongiae sponge‚ Chondrocladia nicolae has a peculiar feeding process of being carnivorous they have proven to eat small crustaceans and having the distinctive orange color that is considered different from the other species under the Family Cladorhizidae.It has an anchorate isochelae with 3 teeth and spicules used to hook prey.The ‘skeleton of this species consists of axes and
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percentage of blubber to help keep it warm. These whales can weigh up to 3‚500 pounds. These whales have also developed a special kind of hearing called echolocation‚ which helps it to find blowholes under the sheet of ice in the Arctic. Most beluga whales live on a diet of fish‚ crustaceans‚ squid‚ octopus‚ crabs‚ sand worms‚ and other small prey. They consume on average‚
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Marine Ecology Group 6 Leader: Lester Hernandez Members: Jerome Pineda Bren Phillip Carasco Arizza Mae Delos Reyes Niña Clarisse Monzales Roxanne Ocampo Marine Fauna * Are animals that inhabit the seas and oceans * Some marine animals subsequently transferred to life in fresh water and on dry land‚ giving rise to freshwater and terrestrial fauna. * Some vertebrates that returned to the marine environment have retained their ties to land‚ leaving the sea for reproduction
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control of movement; they also are the centres for the initiation of complex behaviour. The deutocerebrum contains the association centres for the first antennae. The posterior tritocerebrum contains association neuropils for the second antennae (of crustaceans) and gives rise to nerves that innervate the mouthparts and the anterior digestive canal. The latter constitute the stomatogastric system‚ which regulates the intake of food and the movement of the gut necessary for digestion. This system bears
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