Animal Diversity The number of animal varieties familiar to us is vast as the animal world is diverse. Each distinct variety or type of animals is recognized by scientist as a species. Animals of most species are free-living forms but of others are parasitic in bodies of other animals or even plants. According to their habitats animals are divided into the following types Aquatic animals :- They live in water . Animals living in sea water are called marine & those live in river‚ponds‚streams
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NERVOUS SYSTEM The human body’s activities are regulated by two systems – the nervous system and the endocrine system. Although both systems control body functions‚ their methods differ. The nervous system is the body’s information gatherer‚ storage center and control system. Its primary function is to collect information about the external conditions in relation to the body’s external state‚ to analyze this information‚ and to initiate appropriate responses to satisfy certain needs; the most
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Pomacentridae or damselfish family that live in tropical marine waters throughout the world. They are home loving creatures and live amongst the tentacles of sea anemones in the shallow waters of coral reefs. Sea anemones are members of the phylum Cnidaria. They have stinging tentacles with specialized organelles called nematocysts
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apply the terms in bold found throughout this exercise. Introduction: Our survey of metazoan diversity continues with the clade Bilateria‚ which consists of animals which have bilaterally symmetrical body plans‚ unlike the radially symmetrical Phylum Cnidaria and the largely asymmetrical Phylum Porifera. Additionally‚ members of this clade are triploblastic‚ meaning that they have three embryonic tissue layers from which structures and organs develop‚ in contrast to the diploblastic cnidarians. The clade
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Wastewater Wastewater is any water that has been adversely affected in quality by anthropogenic influence. It comprises liquid waste discharged by domestic residences‚ commercial properties‚ industry‚ and/or agriculture and can encompass a wide range of potential contaminants and concentrations. In the most common usage‚ it refers to the municipal wastewater that contains a broad spectrum of contaminants resulting from the mixing of wastewaters from different sources. Sewage is correctly the
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1. If a mollusk moves by a broad muscular foot‚ it is probably a) a bivalve b) a gastropod c) two-shelled d) a cephalopod 2. A herbivorous mollusk scrapes algae from rocks and twigs with its a) radula b) poison glands c) foot d) feathery gills 3. The cephalopod that has lost its shell completely is the a) octopus b) slug c) cuttlefish d) nautilus e. squid 4. The blood of annelids typically flows a) only in dorsal vessels c. only in ventral vessels b) in a closed circulatory
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CHAPTER 4 ANIMAL KINGDOM Animal Kingdom is characterized by multicellular‚ eukaryotic organisms. The cells lack cell walls. They ingest and digest food (holozoic)‚ hence they are heterotrophic. Higher forms show elaborate sensory and neuromotor systems. Majority of them are motile. Reproduction is mostly sexual and embryological development is present in them. About 1.2 million species of animals are described till now. The classification helps to assign a systematic position to newly described
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Biology 110-12 . 1. What are the five kingdoms and give a brief description of each kingdom? Answer: Monera- Single celled prokaryotes;bacteria Protista - Mostly single celled eukaryotes; Photoautotrophs (algae) and heterotrophs (protozoa) Fungi-Multicellular eukaryotes that feed by extracellular digestion and absorption Heterotrophs: includes decomposers‚ many pathogens and parasites Plantae-Multicellular photosynthetic autotrophs producers Animalia- Diverse multicellular heterotrophs Range from
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Butterfly cod What is a butterfly cod? Butterfly cods are spectacular fish with brilliant colouring and long defensive spiny fins. It is part of the scorpionfish family‚ but unlike other members of this family which often rely on camouflage for protection‚ they swim freely around coral reefs‚ leaving their venomous fins to give them 360 degree protection. They include the firefish (Pterois species) and lionfish (Dendrochirus species). What do they look like? Butterfly cod are characterised by
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June 8‚ 2009 -- Giant jellyfish like this one are taking over parts of the world’s oceans as overfishing and other human activities open windows of opportunity for them to prosper‚ say researchers. In this photo‚ a diver is attaching a sensor to track a monster Echizen jellyfish‚ which has a body almost 5 feet across‚ off the coast of northern Japan. Jellyfish are normally kept in check by fish‚ which eat small jellyfish and compete for jellyfish food such as zooplankton‚ researchers said. But
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