Category Archive: Invertebrates

Jun 12

Nectaries and Nectar

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Inhabit marine interstitial environments BOX 12I Characteristics of the Phylum Gnathostomulida Figure 12.34 Representative gnathostomulids. (A) Haplognathia simplex. (B) Austrognatharia kirsteueri. (C) The pharyngeal jaw apparatus of Gnathostomula mediterranea. That ability to move and the intelligence to go with it gives vertebrates such as reptiles and birds an advantage in the natural world. They do not “waste” the silk of the old web, but eat it before or during the production of a new one.

Jun 12

The Plant-Parasitic Nematode Genus Meloidogyne Goldi, 1892

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The female reproductive system consists of a single pair of ovaries located posterior to the male system (Figure 13.19C and 13.36B). This page was last modified on 9 August 2016, at 11:54. These are serially ho- mologous structures, constructed similarly but differing in the position of their associated pores (at the base of the second antennae or the second maxillae, respectively). The mouth is located ventrally, either near the middle of the body or more anteriorly.

Jun 12

An Introduction to Protochordata

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It is very important to never pass on your own personal fears or phobias, so teachers must always be aware of their own reactions to things. Archives available at http://www.vims.edu/~jeff/archive.htm =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= ------------------------------ Date: Mon, 01 Feb 1999 09:03:57 -0500 From: Jeffrey Shields Subject: CRUST-L: multiple limb autotomy (fwd) Please respond to Glen Davidson and not to me. Nocturnal attacks on nearshore fishes in southern California by crustacean zooplankton.

Jun 12

Invertebrata: Animals Forms and Functions

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UNCORRECTED PAGE PROOFS In addition to budding, freshwater ectoprocts (Phy- lactolaemata) reproduce asexually by the formation of statoblasts (Figures 21.5, 21.14B,C, and 21.15). In this lab, students will be introduced to the concept of a dichotomous key of selected marine mollusks, before putting their dichotomous key reading skills to crustaceans, dichotomous key, echinoderms, ecosystem, eukaryotic, food web, about invertebrates to review and elaborate on what students have learned... Recent studies by two German zoologists, D.

Jun 12

The Frit Flies (Chloropidae, Diptera) of Fennoscandia and

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In one group, the Merostomata, the opisthosoma may be Phylum Arthropoda: The Cheliceriformes The skin of it is so soft, smooth, polished and neat, that she precedes the softest skin’d Mayds, and the daintiest and most beautiful Strumpets … she hath fingers that the most gallant Virgins desire to have theirs like them, long, round, of exact feeling, that there is no man, nor any creature, that can compare with her.

Jun 12

Illustrations Of Comparative Anatomy, Vertebrate And

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Ectoprocts contain no respiratory pigments, and gases are carried in solution. Especially appropriate predators to use in this project include salticids (“jumping spiders”), mantises and predatory hemipterans (e.g., “assassin bugs”). The exact position of the clitellum and the number of segments involved are consistent within any particular species. In some groups the number of cephalic somites (and hence appendages) varied from this typical arrangement.

Jun 11

Aquatic Oligochaete Biology IX: Selected Papers from the 9th

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Organs are composed of tissues, and may be organized into larger organ systems. organ system -- Collection of organs which have related roles in an organism's functioning. Active predation often involves five recognizable steps: prey location (predator orientation), pursuit (usu- ally), capture, handling, and finally, ingestion. In species that possess nidamental glands, fertilization is followed by brooding until release at the actinotroch stage. The reproductive organs are similarly placed and connected in both sexes.

Jun 11

Studies on the Ecology of Tropical Zooplankton (Developments

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Raptorial feeding is common in many species of Monogononta. This regenerative ability used to be used by Florida commercial sponge farmers, who propagated their sponges by attaching “cuttings” to submerged cement blocks. A few tropical species have toxins powerful enough to raise blisters on the skin of humans. The phoronids are a small group, comprising only two genera and about 20 species of solitary or gre- garious worms. Parker (ed.), Synopsis and Classification of Living Organisms, Vol. 1.

Jun 11

The Oxford Book of Invertebrates: Protozoa, Sponges,

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In many forms this flagellum lies against the side of the cell and its outer membrane is attached to the cell body’s membrane. Beyond the problems of relationships among the various protist groups them- selves, we are faced on one hand with questions about the very origin of eukaryotic life on Earth, and on the other with interpreting the ancestral forms of the rest of the living world. Cleavage in entoprocts is holoblastic and spiral. The general anatomy of the arthropod compound eye was described in Chapter 15, but several distinct structural trends are found in hexa- pod eyes, as we describe below.

Jun 11

Atlas of Marine Zooplankton Straits of Magellan: Amphipods,

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Mating has been studied in some gordioids. Still another physiological trick of some sponges is the ability to rapidly produce copious amounts of mucus when dis- turbed. The acanthobdellids and branchiobdellids show a mixture of characteristics between the oligochaetes and the “true leeches,” although at least the branchiobdel- lids are now viewed as modified oligochaetes and not an evolutionary “link” to the hirudinidans. The first pair is modified as maxil- lipeds, and the last pair is absent in females.

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