Browsed by
Category: Invertebrates

Reproduction of Marine Invertebrates V2: Entoprocts and

Reproduction of Marine Invertebrates V2: Entoprocts and

Format: Print Length

Language: English

Format: PDF / Kindle / ePub

Size: 14.89 MB

Downloadable formats: PDF

Neither of these strategies is without limits, and tolerance to various environmental salinities varies among different species. Other viruses, although also often able to kill cells, frequently have a more subtle effect. Saxitoxins block the sodium–potassium pump of nerve cells and prevent normal impulse transmission. Yours, DIETER Dieter Walossek Section for Biosystematic Documentation University of Ulm, Helmholtzstrasse 20, 89081 Ulm, Germany phone 0731-50-31000/31001, Fax 31009 e-mail: dieter.walossek@biologie.uni-ulm.de - http://www.biologie.uni-ulm.de/biosysdoc/ Homepage of the >Gesellschaft fuer Biologische Systematik<: http://www.biologie.uni-ulm.de/biosysdoc/gesfbsys.htm/ =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= To (un)subscribe to CRUST-L: Send (UN)SUBSCRIBE CRUST-L as the message body to MAJORDOMO@VIMS.

...

Read More Read More

Bibliography of Onchocerciasis

Bibliography of Onchocerciasis

Format: Paperback

Language:

Format: PDF / Kindle / ePub

Size: 5.35 MB

Downloadable formats: PDF

Un- like most arthropods, millipedes move the two pairs of legs on each diplosegment synchronously (stability is not a problem in these elongate creatures). Place the slide on the stage of the compound microscope, without a coverslip, and observe the animal with 100X. PHYLUM ANNELIDA 415UNCORRECTED PAGE PROOFS Figure 13.21 Polychaete circula- tory and gas exchange systems. (A) A segment and parapodium (cutaway view) of a nereid.

...

Read More Read More

Systematics of Cyst Nematodes (Nematoda: Heteroderinae),

Systematics of Cyst Nematodes (Nematoda: Heteroderinae),

Format: Hardcover

Language: English

Format: PDF / Kindle / ePub

Size: 7.35 MB

Downloadable formats: PDF

When present, the eversible portion of this foregut (the proboscis) is derived from the buccal tube or the pharynx. The mitochondrial genome of the sipunculid Phascolopsis gouldii supports its association with Annelida rather than Mollusca. Those that are thought to have separate sexes may also be protandric, but with a long temporal separation of the male and female phases. A gelatinous connective tissue layer, the mesoglea, lies between the two epithelia.

...

Read More Read More

Metal Catalysed Reactions in Ionic Liquids: 29 (Catalysis by

Metal Catalysed Reactions in Ionic Liquids: 29 (Catalysis by

Format: Print Length

Language: English

Format: PDF / Kindle / ePub

Size: 6.28 MB

Downloadable formats: PDF

Undoubtedly, when this epic materializes, research and interest in California sponges will in- crease. These two, plus all the other known invertebrates, have only one cluster of Hox genes, while the vertebrates have duplicated their original cluster more than once. The special creation of diverse organisms and the degree of change within the created kinds over several thousand years is consistent with the evidence seen in the fossil record. Tickets can be purchased in the zoo office during regular business hours.

...

Read More Read More

Encyclopedia of Entomology (4 Volume Set)

Encyclopedia of Entomology (4 Volume Set)

Format: Hardcover

Language: English

Format: PDF / Kindle / ePub

Size: 11.13 MB

Downloadable formats: PDF

The hemichordates include 85 or so species, most of which are benthic burrowers known as tongue worms or acorn worms. There is no evidence of transient or rudimentary parapodia in any clitellate an- nelids. PHYLUM BRACHIOPODA Class Inarticulata: Valves not hinged, attached by muscles only; valves of organic composition, including chitin, or else cal- careous; pedicle (absent in a few species) usually with intrin- sic muscles and a coelomic lumen; epistome with coelomic channels confluent with lophophoral mesocoel; lophophore without internal skeletal support; anus present.

...

Read More Read More

True Bugs (Heteroptera) of the Neotropics (Entomology in

True Bugs (Heteroptera) of the Neotropics (Entomology in

Format: Hardcover

Language: English

Format: PDF / Kindle / ePub

Size: 14.80 MB

Downloadable formats: PDF

Would you like to make it the primary and merge this question into it? The discovery of the gigantic vestimentiferans associated with hydrothermal vents further complicated the con- troversies surrounding these animals. Mostly dioecious; development direct or indirect BOX 22A Characteristics of the Phylum Echinodermata UNCORRECTED PAGE PROOFS burrowers (e.g., Echinocucumis, Mitsukuriella, Rhopa- lodina, Sphaerothuria, Vaneyella, Ypsilothuria).

...

Read More Read More

Spiders of Australia: An Introduction to Their

Spiders of Australia: An Introduction to Their

Format: Hardcover

Language: English

Format: PDF / Kindle / ePub

Size: 11.89 MB

Downloadable formats: PDF

One species (Asterina gibbosa) cements its eggs to the substratum, and another (Leptasterias tenera) broods its early embryos in the pyloric stomach before moving them to the outer body surface (Hendler and Franz 1982). Scutigera is a small centipede that qualifies as a world-class runner, reaching speeds up to 42 cm/second when in pursuit of its favorite prey, flies. Most can be classified as predators, detritivores, or direct deposit feeders. Chemical studies of metabolic processes (e.g. fermentation and/or yeast), processes mediated by biochemical intermediates (e.g. enzymes), or biological organic molecules belong in Biochemistry.

...

Read More Read More

Changing Global Perspectives on Horseshoe Crab Biology,

Changing Global Perspectives on Horseshoe Crab Biology,

Format: Hardcover

Language: English

Format: PDF / Kindle / ePub

Size: 7.80 MB

Downloadable formats: PDF

Further- more, calcareous sponges of the leuconoid condition do pass through asconoid and syconoid stages as they grow, and it is only in this class that all three organiza- tional body plans occur. If your lapbook has pieces for younger and older students, you are allowed to use the younger ones. Geological Society of America and the University of Kansas Press, Lawrence. Photo: Vanessa Auld Red sea urchins (Strongylocentrotus franciscanus) at low tide. Insects and their relatives (subphylum Hexapoda) are more species-rich than all other forms of life combined.

...

Read More Read More

Dragonflies of the World

Dragonflies of the World

Format: Print Length

Language: English

Format: PDF / Kindle / ePub

Size: 13.29 MB

Downloadable formats: PDF

These animals were recov- ered from dredge samples taken in 200 to 300 meters of water and were found clinging to hydroid colonies by their prehensile stalks. Hakan Ohlssons, Lund. 1,682 pp. [Whew!] Laufer, H. et al. 1987. Among other defining characteristics (Box 22A) is a uniquely echinoderm feature known as the water vascular system, a complex sys- tem of channels and reservoirs that is derived from the coelom and serves a vari- ety of functions. Flatworms also have eyespots called "ocelli".

...

Read More Read More

The Evolution of Mating Systems in Insects and Arachnids

The Evolution of Mating Systems in Insects and Arachnids

Format: Paperback

Language: English

Format: PDF / Kindle / ePub

Size: 12.40 MB

Downloadable formats: PDF

Harvestmen (Opil- iones), the main predators of glowworms, use the light to locate their prey! These “love songs” attract conspecific females for copulation. Despite these challenges, the emerging field of molecular phylogenetics has opened vast new opportunities for resolving long-standing evo- lutionary questions and for testing morphology-based phylogenies with new data. Associate Professor Sonia Altizer and doctoral student Andy Davis compared migratory monarchs from the eastern and western United States to those in Hawaii, Costa Rica, South Florida and Puerto Rico that do not migrate.

...

Read More Read More