Skeletons of radiolarians, Biology

Skeletons of radiolarians

The skeletons of radiolarians and foraminiferans form a primary constituent of ocean bottoms where they form 30% or more of the sediment. It is called a radiolarian ooze or foram. However at depths below 4000 m, the shells tend to dissolve due to pressure. The shelled amoeboid protozoa are the only large group of protozoa that have a fossil record.


Figure: Skeletons sturucture of radiolarians

The radiolarians are amongst the oldest known fossils. Extensive accumulation of foram shell In the mesozoic and cenozoic eras contributed to the formation of great limestone and chalk deposits in different parts of the world. The quarries from which the Egyptian pyramids were built are composed mainly of foram shells.

Posted Date: 1/12/2013 7:02:43 AM | Location : United States

Related Discussions:- Skeletons of radiolarians, Assignment Help, Ask Question on Skeletons of radiolarians, Get Answer, Expert's Help, Skeletons of radiolarians Discussions

Write discussion on Skeletons of radiolarians
Your posts are moderated
Related Questions
Define Iodothyronine Deiodinases - functions of selenium in humans? Another group of selenoproteins are the iodothyronine deiodinases essential for the conversion of thyroxine

Determine Health Hazards Associated with High Altitude? Abrupt exposure to altitudes greater than 10,000 ft (3050 in) elevation is frequently associated with symptoins of altit

The Protein targeting or protein sorting is the mechanism by that a cell transports proteins to the appropriate positions in the cell or outside of it. A Sorting targets can be the

Classification of Different Agro-Industrial By-Products The agro-industrial by-products can be grouped according to the content of nutrients namely: (i) Energy rich supplem

Explain the energy flow of ecology? Energy flow: As you can see, energy flow is one way in an ecosystem. Energy is not recycled. The ultimate source of energy that powers eco

Q. What are few examples of mineral salts from the diet that act as coenzymes? Magnesium, copper and zinc are examples of biological coenzymes. Q. What is the disease cause

Mutations are the only kind of variability generating mechanism in prokaryotes and asexually reproducing organisms. But in eukaryotes where sexual recombination occurs, even in one

Which of the following is TRUE about the properties of aqueous solutions? Select one: a. A pH change from 5.0 to 6.0 reflects an increase in the hydroxide ion concentration (

what are the general characters of nonchordates, explain

Explain the stages in taxonomic procedures - Beta Taxonomy This stage is also known as macro taxonomy or synthesis taxonomy. At this level the species are arranged or classifie