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.

1524_Radiolarians.png

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
CAR E OF EYES - 1.       Eyes should be periodically examined in children. 2.       While reading the paper should be held 36 cm. away from eyes and preferable at an angle

Differentiate between Total Fertility Rate (TFR) and Replacement Level (RL) Due to uncontrolled excessive hunting the population of tigers in a forest becomes Zero. Discuss the

Question 1 Explain Sialography? How will you perform the same? Question 2 How will you set up your radiology department to take up the IVU studies? Question 3 D

Determine the Light-Near Dissociation Test The near  response should be  tested  in  a well  lit room  so that  the object  is clearly visible. The patient  is given  an  accom

Q. What is the basic importance of water for enzymatic activity? Ans. Biological catalysts, Enzymes, relay on water to reach their substrates and attach to them. There is

what year did virchow state where a cell exists there must have been a pre-existing cell

Young's Trichromatic Theory According to Young's theory, three types of cones exist, each sensitive to a particular pigment-rythrolabe (red), chlorolabe (green), and cyanolabe

Explain the Regulation of blood pressure? The renin-angiotensin system regulates the blood pressure. The synthesis of renin is decreased by calcitriol through its interaction

Q. Finding the Problem by communication process? - Open up the patient with general talk. - Initiate topic easy to talk. - Ask simple questions easily understood. - As

What might happen to membranes if many -OH groups were added to the tails of phospholipids?