Essays Tagged: "invertebrates"

Evolution of Immunity in Invertebrates

Pretty Thorough Summery of the Article -'Article Summery'Name: 'Immunity and the Invertebrates'Periodical: Scientific American Nov, 1996Author: Gregory Beck and Gail S. HabichtPages ... ell refusing grafts from other sponges. This process of refusing is not the same in vertebrates and invertebrates though. Because vertebrates have acquired immunologic memory they are able to reject t ... gh. Because vertebrates have acquired immunologic memory they are able to reject things faster than invertebrates who must constantly 're-learn' what is and is not self. Complement and lymphocytes are ...

(5 pages) 56 0 3.0 Oct/1996

Subjects: Science Essays > Biology

The Classification and Evolution of Sponges and Starfish.

hinodermata and Mycale sponge a member of Phylum Porifera. Both are members of Kingdom Animalia and invertebrates. The relative ages of each are Pre-Cambrian and early Cambrian to Ordovician respectiv ...

(3 pages) 53 0 5.0 May/2003

Subjects: Science Essays > Biology

Everything you need to know about worms and perhaps some you didn't.

lindworm, a limbless, snakelike lizard. However, the name is properly applied only to certain adult invertebrates.Worms play a major role in virtually all ecosystems. Some terrestrial worms condition ... depending on the classification scheme used.Flatworms are primitive, usually broad and flat-bodied invertebrates. They are placed in the phylum Platyhelminthes, which most authorities divide into thr ...

(6 pages) 45 0 3.0 Nov/2003

Subjects: Science Essays > Biology

Green Tree Frog.

yes are often golden-brown (Conant 1975).^ Natural History^ Food HabitsEats insects and other small invertebrates. Sometimes found on houses around windows or outside lights, where it pursues the inse ...

(6 pages) 39 0 3.0 Dec/2003

Subjects: Science Essays > Environmental Science

Are The Brachiopods And The Bryozoa Two Of The Most Abundant Species From The Ordovician Period?

must be accomplished. This period experienced the origin and rapid evolutions of many new types of invertebrates (Kazlev, 2002)Two of the major invertebrates in the Ordovician period are the Brachiop ... d website with lots of information.Kazlev, M. June 7, 2002. The Brachiopoda. Targeted audience would seem to be adults. Very good webs ...

(4 pages) 28 0 5.0 Mar/2004

Subjects: Science Essays > Biology

Discuss the roles of development, learning and evolution in the construction of the nervous system.

ly simply by looking at the differences that occur in nature, from the relatively simple systems in invertebrates through to what is perhaps the pinnacle of complexity in the primates. Natural selecti ... h more richly interconnected brain and thus the complexity observed in those of higher vertebrates. Invertebrates have never evolved such a compound due to the absence of cells functionally analogous ...

(11 pages) 109 0 4.3 May/2004

Subjects: Science Essays > Biology > Human Biology

Full classification of the Giant Squid (Architeuthis dux)

Genus Architeuthidae are the largest known cephalopods, the largest known mollusks and the largest invertebrates ever known to exist in the ocean.Habitat: A giant squid lives between 200 and 1000 met ... her family. The giant squid are unique because, they are the largest known mollusks and the largest invertebrates ever known to exist in the ocean. This squid has one of the largest beaks known of any ...

(4 pages) 38 1 3.9 May/2004

Subjects: Science Essays > Biology


dom and are classified in the phylum Arthropoda.: There are more arthropods than any other group of invertebrates. And, considering that 95 percent of all animals are invertebrates, that makes arthrop ...

(3 pages) 32 1 2.0 Nov/2005

Subjects: Science Essays > Zoology

Compare responses of named Australian ectothermic and endothermic organisms to changes in the ambient temperature and explain how these responses assist in temperature regulation

and fall with ambient temperature changes. Most organisms are ectotherms. Examples are plants, all invertebrates, fish, amphibians and reptiles- ENDOTHERMS are organisms whose metabolism generates en ...

(2 pages) 28 0 3.0 May/2006

Subjects: Science Essays > Biology

A Short report of Spiders

Crawling around on eight legs, are some of the most fascinating invertebrates on earth, spiders. There are approximately 40000 known species of spiders. Of the 4000 ...

(2 pages) 27 1 3.8 Sep/2006

Subjects: Science Essays > Biology

Digestive System Evolution

Digestive System Evolution The digestive systems of mammals and other invertebrates are all similar, and yet in their own way quite different. Most invertebrates have ada ...

(3 pages) 36 0 5.0 Apr/2001

Subjects: Science Essays > Biology

Environmental protection

. Ecologists recognize a far greater threat to the much larger number of species of reptiles, fish, invertebrates, and plants that are being wiped out by human activity. In the past few decades, vast ...

(8 pages) 130 0 5.0 Feb/2008

Subjects: Science Essays > Environmental Science


opical rainforests hold 70% of the world?s vascular plants, 30% of all bird species, and 90% of all invertebrates.The major loss of rainforests also affects humans. Farming depends on finding and harb ...

(1 pages) 13 0 5.0 Feb/2008

Subjects: Science Essays > Environmental Science

What is Cloning and how does it work

nimal KingdomPlants are not the only things that can be cloned. The unfertilized eggs of some small invertebrates like worms, lizards and frogs can develop into full grown adults under certain environ ...

(4 pages) 11 0 0.0 May/2009

Subjects: Science Essays > Biology


carpel, where deposited pollen germinates (botany), a pigmented eyespot in some protozoan and other invertebrates or the spiracle of an insect (zoology), or Christianity marks resembling the wounds of ...

(7 pages) 19 0 0.0 Jan/2010

Subjects: Social Science Essays > Sociology