Skeletons of radiolarians, Biology

Assignment Help:

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.


Related Discussions:- Skeletons of radiolarians

Prior to the solving of the structure of dna, Prior to the solving of the s...

Prior to the solving of the structure of DNA, Erwin Chargaff calculated the amounts of the four nucleotides (A, T,G,C) and made which of the following conclusions? A. All four

Economic development and health, Economic Development and Health The c...

Economic Development and Health The contribution of good health to improved growth and development prospects (or its opposite i.e. the contribution of poor health to reduced e

Reproduction in human beings, Are sperms being attacked by the body since t...

Are sperms being attacked by the body since they are foreign?

Define tests to measure flexibility component in the humans, Define Tests t...

Define Tests to Measure Flexibility Component in the Humans? The flexibility component measures the elasticity or range of motion around a joint. This component of physical fi

What is cytogenetics, What is Cytogenetics? Before the advent of modern...

What is Cytogenetics? Before the advent of modern technology, the American biologists Thomas Hunt Morgan, G.W. Beadle, H. Sturtevant, Barbara McClintock, and others contributed

Bottleneck for external sources for health care, Bottleneck for External So...

Bottleneck for External Sources for Health Care The implementation bottlenecks arising out of funding by external sources have important implications for the resource allocati

Define left posterior hemiblock, Q. Define Left Posterior Hemiblock? Bo...

Q. Define Left Posterior Hemiblock? Bobbna and associated reported four cases in which they proposed that the left posterior hemi block was initiated by exercise. In their pa

Protozoa, way of remember phylum protozoa

way of remember phylum protozoa

Important for core body temperature, Why is it important for core body temp...

Why is it important for core body temperature to stay more constant than skin temperature?

Define the characteristics of bt cotton, Some of the characteristics of Bt ...

Some of the characteristics of Bt cotton are: 1.  Long fibre and resistance to aphids 2.  Medium yield, long fibre and resistance to beetle pests 3.  High yield and produ

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd