Earthworm is the common name for the largest members of Oligochaeta (which is either a class or subclass depending on the author) in the phylum Annelida. In classical systems they were placed in the order Opisthopora‚ on the basis of the male pores opening posterior to the female pores‚ even though the internal male segments are anterior to the female. Theoretical cladistic studies have placed them instead in the suborder Lumbricina of the order Haplotaxida‚ but this may again soon change. Folk names
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The seven processes of life The seven processes of life are the key to all living organisms: these processes consist of nutrition‚ growth‚ movement‚ respiration‚ reproduction‚ sensitivity and excretion. Although‚ they may be achieved in different ways depending on the organism. These processes happen with in both plants and animals; in each organ‚ cell and organelle. All these processes are interlinked and have a chain effect upon one another. Without one of them the others aren’t possible.
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2010 Study Guide for BSCI207 Midterm 2 Ch. 32: Metazoans Key Concepts: ● Understand the set of characteristics that distinguish the metazoan clade ● Understand processes governing early development of metazoans (cleavage‚ gastrulation‚ etc) ● Be familiar with the phylogenetic tree that organizes relationships between metazoans using their synapomorphies (pg. 697 in book) ● Know the hypotheses that potentially explain metazoan origins ● Know the hypotheses regarding the origins of bilaterians
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32.2.2 Segmentation allowed for redundant systems and improved locomotion Hox genes cause segmentation development 2 advantage of Hox genes Highly segmented animals‚ usually have nearly complete set of organs in theirs each segment of body. This result to less damage in their body‚ since other segment duplicate the damage segment functions Locomotion is more efficient‚ since partitions isolate the segment can contract and expand autonomously. 32.3. The Classification of Animals Animals divided
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Diversity in Living Organisms Q 1 Name the branch of the biology that deals with the classification. Q 2 Who was the first to propose the two-kingdom system of classification? Q 3 Who proposed three-kingdom classification? Q 4 What is meant by triploblastic? Q 5 What is haemocoel ? Q 6 Name the person who has given the five-kingdom classification. Q 7 Which is the largest phylum of animal kingdom? Q 8 What is the function of canal system in sponges? Q 9 What are Gymnosperms
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BHARATHI MATRIC HR. SEC. SCHOOL KALLAKURICHI STD: X SUB: SCIENCE PRE QUARTALY TIME: 3.00 MARK: 100 PART-A I. Choose the correct answer 15x1=15 1. Pick out the wrong statement (a) In a dicot seed there is a short longitudinal whitish ridge is called the Raphael (b) There is a minute opening in dicot seed is known as micropyle . (c) The rudimentary stem portion known as radical. (d) The rudimentary root portion is called radical. 2. The roots of coconut tree are seen
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FIVE KINGDOM CLASSIFICATION Biological System of Classification • Organisms are first divided into a few kingdoms • Phylum or division is made up of several classes • Classes are made up of orders • Within each order there is a family • Each family consists of a varying number of genus • A genus usually has several species. Organisms within the species can breed PROCARYOTAE KINGDOM Prokaryote • Also called as bacteria‚ these as believed to be the most abundant
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Digestive Systems in Different Animals Different species of animals have different digestive systems which are adapted to their unique requirements. The type of food‚ method of food gathering and energy needs are some factors that influence the type of digestive system an animal needs in order to survive. Herbivores have a more specialised digestive system than that of a carnivore because it is more difficult to digest vegetation than meat. The teeth are flat so that grass and plant material can
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Experiment 3 Stream Ecology: Examining the Physiochemical and Biological Processes of a Stream Jaclynn D Dame Date Performed: 09/23/2013 Date Submitted: 09/30/2013 University of Denver 2199 S University Blvd Denver‚ CO 80210 Introduction: The purpose of this experiment is to understand the physiochemical and biological processes of a stream by observing a lotic stream (moving stream). In observing the stream will come a better understanding of how the chemical
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The Horseshoe Crab‚ scientifically named Limulus Polyphemus‚ is an ancient creature that not many people know much about. The Horseshoe Crab is part of the Limulidae family‚ which is the marine arthropods. The Horseshoe Crab’s closest relatives are Trilobites back from the Paleozoic which is coincidently when the Horseshoe crab first began to develop. (Reference 2) In modern times the Horseshoe crab is not labelled as a crustacean despite its name. The Horseshoe Crab is closely related chelicerates
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