CHECK THESE SAMPLES OF Evolution of Planktonic Larval Forms from Benthic Bilateral Animals
The study of the evolution of these species was pioneered in the year 1866 by a scientist, Kowalevsky who made a discovery that tunicates possess tadpole larvae and this hence led to many hypotheses that tunicates are “ancestral chordates”.... However, it is still difficult to find similarities in the characteristics between chordates and ambulacraria larval patterns.... Romer's theory of chordate evolution which had postulated that the lophophorates were basal deuterosomes was a hypothesis that was disproven in the late 1990's by molecular phylogenies....
3 Pages
(750 words)
Essay
The popular theory of Garstang about the apparent similarities during the larval development established that the rolling of ambulacraria larva into the posterior neural tube resulted in the evolution of chordate tadpole larvae.... This has led to the hypothesis that the inversion of the mouth to the other side of the ancestor's body resulted in the evolution of the vertebrate (Christiaen et al.... The only assumption in this hypothesis is the independent evolution of the central nervous system in hemichordates and chordates....
3 Pages
(750 words)
Essay
In about six weeks the wingless, scaly larvae, or nymphs, burrow into the ground, where they remain for 13 or 17 years, feeding on juices, the xylem sap, sucked from roots of the flora present in that area encompassing grasses, forbs or trees.... This is also a transition from its restricted life to free life where it has the freedom to fly.... When the adult emerges from its cocoon it is consumed as food by human beings also either as such i....
3 Pages
(750 words)
Essay
How oil can enter an organism
Oil can enter into plants and animals' bodies through different ways such as “physical exposure, ingestion, absorption and through food chain” (Fingas and Charles, p.... Absorption of oil occurs through transfer of volatile components through membranes of plants and some animals while exposure through food chain involves multiple transfers through ingestion (Fingas and Charles, p.... Marine mammals
Marine animals are affected by spill pollution in different ways depending on species and age (Fingas and Charles, p....
2 Pages
(500 words)
Dissertation
It is a polyphagous insect.... The pest's larvae have been for ages responsible for defoliating acres of forested lands as well as shrubs and trees in… Additionally, the insect has causes negative significant negative economic impacts.... According to Sparks, Michaels and Daniels (2013), defoliation caused by the insect is a cause of a major concern especially in the Cork Oak Forest....
5 Pages
(1250 words)
Essay
In benthic octopuses, it is the third arm on the right that serves as the hectocolylus.... 78).
During reproduction, the ales use the hectocotylus (a special arm) to dispense packets of sperm (spermatophores) from the reproductive tract's terminal organ/ cephalopod penis, into the mantle cavity of the females....
4 Pages
(1000 words)
Essay
As far as its appearance is concerned it occurs in bright colors mainly from brown shades to bright neon colors.... Differently from other organisms that have their respiratory system within the thoracic region, the stomatopods have their respiratory system within the abdomen.... A flat tail segment forms the end of the abdomen with a pair of appendages, or uropods which are fanlike (ALF,2008) There are obvious physical differences between the genders of stomatopods....
7 Pages
(1750 words)
Case Study
Nematodes are roundworms and one of the most diverse of all animals with over 28,000 having been described, of which 16,000 are parasitic.... bancrofti is the mosquito culex quinquefasciatus and the parasite is spread through the bite of the mosquito and is carried from person to person in countries that are subtropical and tropical.... This research will begin with the statement that Wuchereria Bancrofti belongs to the domain Eukaryota which consists of all life forms with the ability to act or function independently as opposed to the prokaryote kingdom which is unicellular and lacks membrane-bound nuclei....
5 Pages
(1250 words)
Research Paper