• Invertebrates
  • ATLAS INVERTEBRATE STRUCTURE

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    Furthermore, Hydroctena has a single apical sense organ, although its construction dif- fers from that of ctenophores. Remipedes possess a suite of features that appear to be extremely primitive, most notably a very long body with no postcephalic tagmosis, a double ven- tral nerve cord, serially arranged digestive ceca, and a simple cephalic shield. The origin and homologization of wing venation has been challenging and heavily debated over the decades.
  • Invertebrates
  • Mites (Acari) for Pest Control

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    Both cir- cular and longitudinal muscles are present in the wall of the proboscis and anterior collar of acorn worms, but elsewhere only longitudinal fibers exist. Nectonema (Nema- tomorpha: Nectonematoidea), a parasite of decopod Crustacea in the Bay of Fundy. Zool. 137. [Includes an outstanding bibliogra- phy of papers dealing with marine nematodes.] Kampfer, S., C. The type collection holds almost all types of the 71 species described by A.
  • Invertebrates
  • Biology of Australian Butterflies Monographs on Australian

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    Phylogenetic study of cirripedes and selected relatives (Thecostraca) based on 18S rDNA sequence analysis. Similar myonemes are found in the cell walls of other ciliates (e.g., Stentor), and they are capable of contracting and extending the entire cell. Most centipedes are surface-dwelling predators that must move quickly to capture their prey. You don't have to be a graphic artist to produce a useful notebook; you simply need to recognize what you have drawn.
  • Invertebrates
  • Aquatic Mites from Genes to Communities

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    Budding in pyrosomes results in the characteristic floating colonies seen in species of this family (Figures 23.14A,B). Eventually, or if isolated from a female, the male devel- ops into a female. Fine structure of a spider joint recep- tor and associated synapses. In addition, the gastroneuron line came to rely on “downstream cil- iary feeding,” in which the larvae capture food particles from the water on the downstream side of the ciliary feeding bands, whereas the notoneuron line developed “upstream feeding,” in which the larvae capture food particles from the water on the upstream side of the cil- iary feeding bands.
  • Invertebrates
  • Invertebrate Photoreceptors: A Comparative Analysis

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    Such system has also been found to operate in crustaceans [ 65 ]. A vertebrate distinguished by a skull with no openings in the side behind the eyes, e.g. turtles. anus -- End of the digestive tract, or gut, through which waste products of digestion are excreted, as distinct from the mouth. bipedal -- adj. In most phyla that undergo spiral cleavage (e.g., flatworms, an- nelids, and molluscs), a single micromere—the 4d cell, called the mesentoblast—proliferates as mesoderm be- tween the developing archenteron (entoderm) and the body wall (ectoderm) (Figure 4.8A).
  • Invertebrates
  • Natural Enemies: An Introduction to Biological Control

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    INTRODUCTION 9 Specialists in certain groups estimate that the known kinds of organisms probably represent only a small fraction of actual existing species. Biology encompasses a broad spectrum of academic fields that are often viewed as independent disciplines. My notes actually list 11 families (below), but I have NOT checked this list against the Kensley/Schotte lis= t for accuracy (theirs or mine), and some of these may no longer be valid, = or may be in dispute.
  • Invertebrates
  • Entomopathogenic Nematology (Cabi)

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    Schemes B and C are phylogenetic systematic classifications. Finally, when the pupa is ready to molt, juvenile hormone is absent from the hemolymph altogether; this deficiency leads to a pupa-to-adult molt. Upon hatching, a larval stage called an oncomiracidium is re- leased to the environment (Figure 10.29). Either list or draw the things living there–all the living things. Archives available at http://www.vims.edu/~jeff/archive.htm =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= ------------------------------ Date: Wed, 27 Jan 1999 13:53:06 -0800 (PST) From: Chris Wood Subject: CRUST-L: Daphnia I am looking at heart rate in Daphnia in response to temperature changes and certain chemicals (e.g. acetylcholine, adrenaline etc.) as part of a school-level biology project.
  • Invertebrates
  • Photoreception and Vision in Invertebrates (Nato Science

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    This seemingly simple process actually involves complex changes in cell fine structure, chemistry, and behavior. Morris et al. (eds.), The Origins and Relationships of Lower Invertebrates. Once extended, the pharynx can be moved about by intrinsic muscles of its wall. The biology of pelagic shrimps in the ocean. Recherches sur les nématocystes (morphologie-physi- ologie-dévelopment). Slight rubbing and edgewear to covers and spine. Does Age Affect Implicit Learning?; The Effectiveness of Flash Cards vs.
  • Invertebrates
  • Myxozoan Evolution, Ecology and Development

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    By the end of this blog you WILL know! (and maybe, you will hate me for telling you) Everyone seems to have a "Weirdest foods" list out there-but here at Echinoblog we offer you only the STRANGEST sampling of bizarre marine invertebrates cuisine! forget insects, snails or shrimp! Whereas the former usually move in concert to capture and handle prey, the defense tentacles move singly, in a so-called searching behavior, in which they extend to three or four times their resting length, gently touch the substratum, retract, and extend once more.
  • Invertebrates
  • General Zoology of Invertebrates (Animal Biology)

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    Compare and contrast platyhelminths and mesozoans. They provide a table with characteristics for molt stages for Callinectes sapidus, but as I recall it is based on the Drach and Tchernigovtzeff paper,so it might work for Scylla. Posted Mar 14, 2003 07:00 PM Pomacanthus Publications, Inc. Likewise, rabbits, cavies, hamsters, mice and their small mammal brethren crave more than critter kibble and plain pellets to...