Browse Category by Invertebrates
Invertebrates

Worms (Looking at Minibeasts)

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In basket stars the arms and the radial canals are branched. Marine flora and fauna of the northeastern United States. Head segmentation in Crustacea—an immunocyto- chemical study. Tiny organisms swimming at low Reynolds numbers (i.e., <1.5) must expend an in- credible amount of energy to propel themselves through their “viscous” surroundings. We are experiencing some problems, please try again. Eggs (nits) are usually attached to the hair or feathers of the host, although the human body louse (a “sucking louse”) may attach eggs to cloth- ing.

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Invertebrates

Insect Hemocytes: Development, Forms, Functions and

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John Wiley and Sons, NY. [An excellent and classic reference.] Rockstein, M. (ed.). 1965–1974. They were discov- ered in maize (Zea mays) by the Nobel laureate Barbara McClintock in the 1950s, but little was known about them until recently. Adaptive strategy and the origin of grades and ground-plans. The villi have micro- filament cores and are connected to one another by anastomosing mucous strands (a mucous reticulum). Like the Crustacea and Hexapoda, the Myriapoda possess two additional head structures: a clypeus– labrum that borders the anterior mouth field, and a hy- popharynx that borders the posterior mouth field.

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Invertebrates

Shells Alive!

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These qualities result in a total ionic concentration in seawater that is similar to that in the body fluids of most animals, minimizing the prob- lems of osmotic and ionic regulation (see Chapter 3). Monotypic: Argyroneta aquatica FAMILY LYCOSIDAE: Wolf spiders (e.g., Ly- cosa, Pardosa, Pirata) FAMILY PISAURIDAE: Nursery-web spiders (e.g., Dolomedes, Pisaura) FAMILY OXYOPIDAE: Lynx spiders (e.g., Oxy- opes) FAMILY THOMISIDAE: Crab spiders (e.g., Thomisus, Xysticus) 2 CHAPTER NINETEEN 1.

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Invertebrates

Jellyfish Blooms

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The major invertebrate phyla include: the sponges ( Porifera ), coelenterates ( Cnidaria ), echinoderms ( Echinodermata ), flatworms ( Platyhelminthes ), roundworms ( Nematoda ), segmented worms ( Annelida ), mollusks ( Mollusca ), and arthropods ( Arthropoda ). Yet based on a more functional or physiological definition, cephalopods exhibit a “closed” vascular system. We included all of Wisconsin's introduced species, and a few of our rarest such as the Black Cisco, now probably extinct due to overfishing.

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Invertebrates

Insect Spiracular System (Ellis Horwood series in entomology

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This observation has led some workers to suggest that the Pterygota may have arisen from aquatic ancestors whose gills evolved into wings, as discussed earlier. For these reasons, biologists who find interest in one of these groups often study both. All nutrients must be taken into the body across the tegument. We now know that all life history strate- gies occur in these regions, and many deep-sea and polar species release free-swimming larvae, and even planktotrophic larvae. The ac- tion of a single podium involves power and recovery strokes, with the process following the same fundamen- tal mechanical principles we have seen in the ap- pendages of many other invertebrates.

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Invertebrates

Parasite Rex: Inside the Bizarre World of Nature's Most

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A new genus and two new species of the crustacean order Thermosbaenacea from the West Indies. Defined terms include: snail, head, eyes, mouth, tentacles, soft body, muscular foot, and shell. Coelomocytes could also be detected in few species of dorylaims (Figure 4 (f)) and mononchs (Figure 4 (e)). In the mountains of New York state, most pest mosquitos belong to the genus Aedes, and breed in temporary, snowmelt pools (Means 1979).

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Invertebrates

Functional Biology of Free-Living Protozoa

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This project aims at a faunal analysis of the benthic fauna in order to understand the structure and functioning of communities in the oligotrophic and exceptionally warm (13�C) deep Eastern Mediterranean. Sensilla are most heavily concentrated on the antennae, mouthparts, and legs. Marine flora and fauna of the northeastern United States: Tardigrada. Ask what language people speak in Germany, Japan, etc. Since they are localized and do not extend far into the body, book lungs must re- ceive sufficient circulating blood to ensure adequate dis- tribution of oxygen throughout the body and removal of carbon dioxide from the internal organs.

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Invertebrates

Invertebrate Cell System Applications, Volume I

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One microtubule of each doublet bears two rows of pro- jections, the dynein arms, directed toward the adjacent doublet.† Flagella and cilia move as the microtubules slide up or down against one another, bending the fla- gellum or cilium in one direction or another. From the deuto- cerebrum, antennulary nerves run to the antennules, while smaller nerves innervate the eyestalk muscula- ture. Sincerely, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ PLAGIARISM – Plagiarism refers to copying and passing off another’s work as one’s own.

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Invertebrates

Reproduction of Marine Invertebrates: Entoprocts and Lesser

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In general, the larval left and right sides become the adult oral and aboral surfaces, respectively, although this pattern often varies from a precise 90° reorientation. Pseudopodia and flagella are present in many different kinds of cells (including plant and animal cells) and their presence does not indi- cate unique relatedness (i.e., they are shared primitive features, or symplesiomorphies). Oxford University Press, New York. [An important, thought-provoking look at the “modern synthesis” of evolution, its shortcomings, and some alternative ideas on evo- lutionary theory.] Eldredge, N. 1989.

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Invertebrates

INVERTEBRATE PALAEONTOLOGY AND EVOLUTION. x + 323 p., num.

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The first pair of opisthosomal appendages lies over the gonopores, forming a genital operculum. You will need to re-organize/graph the data in Excel. A light-hearted attitude toward naming organisms has not always been without Freudian over- tones, as there also exist Thetys vagina (a large, hollow, tubular pelagic salp), Succinea vaginacontorta (a hermaphroditic snail whose vagina twists in corkscrew fashion), Phallus impudicus (a slime-covered mushroom), and Amanita phalloides and Amanita vaginata (two species of highly toxic mushrooms around which numerous aboriginal ceremonies and legends exist).

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