Asymmetrical and spherical - metazoa, Biology

Asymmetrical and Spherical - Metazoa

Some creatures are asymmetrical: no matter which way we try to divide them through the middle, no two halves would appear alike. In simpler words: these are animals which cannot be cut into two identical halves through any plane or axis (longitudinal, sagittal or transverse), Amoeba and most of the poriferans are examples.

At the other extreme, is spherical symmetry. The animals with spherical symmetry can be divided into identical halves along a number of planes which pass through the centre or in other words every plane through the centre will yield two halves which arc mirror images of each other. This type of symmetry is found chiefly in some protozoa and is rare in other groups of animals. Actinophrys and colonial Volvox are typical examples.

Posted Date: 1/15/2013 1:33:25 AM | Location : United States

Related Discussions:- Asymmetrical and spherical - metazoa, Assignment Help, Ask Question on Asymmetrical and spherical - metazoa, Get Answer, Expert's Help, Asymmetrical and spherical - metazoa Discussions

Write discussion on Asymmetrical and spherical - metazoa
Your posts are moderated
Related Questions
Pathophysiology Infective endocarditis occurs when turbulence within the heart allows causative organism to infect previously damaged valves or other endothelial surfaces.

Assume that the blood volume of a rabbit is 0.5 liters. If the effective dose of the anesthetic urethane is 10 Āµgrams/ml of blood, calculate the volume of a 25% urethane solution t

Q What is the excretion? Excretion in Physiology is the procedure of elimination of metabolic wastes and other toxic substances from the body.

STRUCTURE Golgi body consists of :- (1 ) Cisternae These are plate like unbranched structure with dilated ends. One golgi body has 4-8 cisternae. Mono cisternal

Q. What is Dyslipidemia or Hyperlipidemia? It has been known for over five decades now that dyslipidemia is associated with increased severity and prevalence of atherosclerosis

Animal products too are widely used in medicines by traditional societies, and in some urbanized societies that believe in traditional animal-based remedies. Examples of such produ

Q. Explain about eukaryotic organism or Fungi? Fungi are eukaryotic organisms. This means that their DNA-containing chromosomes are enclosed within a nucleus inside their cell

Animal wastes Large quantities of animal wastes are available in the country but generally they are low in nutrient content with poor feeding value to the animals. However, po

describe the importance,principles,techniques and uses of microscopy

Mention causes of implant failure due to improper implant selection. Implant selection errors : a) Improper implant type in improper bone type. b) Improper length, width