phyla

Punctuated equilibrium

...plain the paucity of transition al forms between phyla . Full article >>> Punctuated equilibrium : the belief that evolution proceeds by spurts of change interspersed with long periods of stasis (genetic stability) where selection favors no change. Full article >>>...

Plantae

...fe with the same distinctive body plan. [plural = phyla ]. Full article >>> embryo phyte -- Synonym for the Plantae , as here defined. It includes all green photosynthetic organ isms which begin the development of the sporophyte generation within the archegonium. enations -- Flaps of ...

Phylum

...imal and plant kingdom s are divided; plural, phyla Source: Noland, George B. 1983. General Biology ...on . Full article >>> phylum pl. phyla [Gk. phylon , race, tribe] A taxon omic category; phyla are divided into class es. Full artic...

Phyla

... chromosome . Full article >>> Sim phyla A class of arthropods whose members are charac... leaf mold. Full article >>> The phyla arthropoda and mollusca both have exoskeleton s. Since exoskeleton s necessarily limit growth, p...

Phototropism

...ning of the plant stem toward a light source. phyla : related class es grouped together (singular, phylum ). Full article >>> phototropism The re action of plant s to light in which the plant s bend toward the light. Plant response to light by unequal growth caused by concentra...

Pharynx

... class ification between class and kingdom ; phyla - pl. Full article >>> pharynx The part of the digestive tract between the mouth cavity and the esophagus that, in vertebrates , is common to both digestive and respiratory tracts. In cephalo chordates the gill slits open from ...

Monera

...fe with the same distinctive body plan. [plural = phyla ]. Full article >>> In 1969 Whittaker proposed a "five kingdom " system in which three kingdom s were added to the animals and plant s: Monera ( bacteria ), Protista , and Fungi . Whittaker defined the kingdom s by a number o...

Lens

... s; gives rise to the outer covering and, in some phyla , to the nervous system , inner ear, and lens of the eye. Lab 11 Animal Diversity I Lab 14 Gametogenesis and Development ... Full article >>> compound eye -- Found in many but not all arthropods, a compound eye is composed ...

Kingdom

...ction s are possible. The Kingdom includes five phyla : ... Full article >>> The 3 kingd...imal and plant kingdom s are divided; plural, phyla Source: Noland, George B. 1983. General Biology , 11th Edition. St. Louis, MO. C. V. Mosby ... ...

Fungi

...fe with the same distinctive body plan. [plural = phyla ]. Full article >>> Our medicines, very largely and for most people still in the world today, come from plant s or fungi or micro- organ isms. Our fossil fuels, oil, gas, coal, wood, whatever it is we use for energy comes largely ...

Exoskeleton

...ter covering. Full article >>> The phyla arthropoda and mollusca both have exoskeleton s. Since exoskeleton s necessarily limit growth, phyla with exoskeleton s have come up with various solutions. Full article >>> Animals ...

Ectoderm

... s; gives rise to the outer covering and, in some phyla , the nervous system , inner ear, and lens of t... s; gives rise to the outer covering and, in some phyla , to the nervous system , inner ear, and lens of the eye. Lab 11 Animal Diversity I Lab 14 Ga...

Deuterostome

... . (Echinoderms and Chordates and related minor phyla ). Full article >>> Deuterostome s differ from the other Bilateria, called protostomes, in several ways. In both cases there is a complete digestive tract. However, in protostomes the initial opening (the archenteron ) develops into ...

Clade

...#62;>> The clade contains a number of phyla of which we shall ex amine only 3. annelids (Annelida), mollusks (Mollusca), and flatworms (Platyhelminthes). Full article >>> Types of clade PhyloCode is a formal set of rules governing phylogenetic nomenclature. Its current ver...

Chordate

... (Echinoderms and Chordate s and related minor phyla ). Full article >>>...

Chordates

... . (Echinoderms and Chordates and related minor phyla ). Full article >>>...

Canines

...d on the misunderstanding of the way in which new phyla ( lineage s) arise. Full article >>> Some canines , such the Grey wolf but not the Red wolf or coyote. Domestic dogs are broadly considered carnivorous but the class ification is often debated. Hyenas Some mustelids, including fer...

Anus

...ll article >>> Among the eumetazoan phyla , two are radially symmetric and have digestive chambers with a single opening, which serves as both the mouth and the anus . Full article >>> Visualization of the lining of the anus , rectum and colon through a rigid proctosig...

Animalia

...fe with the same distinctive body plan. [plural = phyla ]. Full article >>> Four organ s are subject to specialization in the kingdom Animalia . The first organ is the tongue which is only present in the phylum Chordata. The second organ is the esophagus . Full article >&...