Tag: origin and evolution of life

Questions Related to origin and evolution of life

Cladistic taxonomy places the birds as Archosaurs, along with the

biology origin and evolution of life fossilization geological time scale, extinctions and fossils concepts of evolution

  1. Mammals

  2. Crocodilians

  3. Turtles

  4. Snakes

  5. None of the above

Show answer
Correct Option: B
Explanation:
Cladistic taxonomy is a way of grouping organisms on the basis of shared features which then are branched out as individual characteristics begin to differ. Birds such as archosaurs are placed along with crocodilians and many species of extinct dinosaurs.
The correct answer is 'crocodilians'.

The skull of Pithecanthropus was found in


biology origin and evolution of life fossilization geological time scale, extinctions and fossils concepts of evolution

  1. Africa

  2. Java

  3. America

  4. All

Show answer
Correct Option: B
Explanation:

Its fossils (some teeth, skull cap and femur bone) were found in 1891 by a Dutch anatomist, Eugene Dubois on the bank of Solo river in Eastern Java.




 

Age of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary periods for different groups of organisms, includes

biology origin and evolution of life fossilization geological time scale, extinctions and fossils concepts of evolution

  1. Electron spin resonance (ESA) and fossil DNA

  2. Study of carbohydrates/proteins in rocks

  3. Study of carbohydrates/proteins in fossils

  4. Study of conditions of fossilization

Show answer
Correct Option: A
Explanation:

ESA is a more precise technique than previously used techniques for the dating of fossils. It is based on the principle of resonance due to electrons and electron deficient centres produced as a result of emission by naturally occurring radioactive elements in a sample. DNA is the information macromolecule in a living system and can be extracted from fossils or other ancient samples. The sequence information in such a DNA can be compared against sequence information of DNA in other samples or living plants and animals, leading to valuable information about the evolution of plants and animals.

Which is Jiving fossil

biology origin and evolution of life fossilization geological time scale, extinctions and fossils concepts of evolution

  1. Coelacanth

  2. Limulus

  3. Sphenodon

  4. All of these

Show answer
Correct Option: D
Explanation:

All these (coelacanth, limulus and sphenodon) are  representative of its own kind hence called living fossil.

Which of the following is the method to form fossils?

biology origin and evolution of life fossilization geological time scale, extinctions and fossils concepts of evolution

  1. Carbonization

  2. Recrystallization

  3. Replacement

  4. All of the above

Show answer
Correct Option: D
Explanation:

Fossils are formed in a number of different ways, but most are formed when a plant or animal dies in a watery environment and is buried in mud and silt. Soft tissues quickly decompose leaving the hard bones or shells behind. Over time sediment builds over the top and hardens into rock.

Types of fossils:- (a) insect preserved in amber, (b) petrified wood (permineralization), (c) cast and mold of a clam shell, (d) pyritized ammonite, and (e) compression fossil of a fern.
So, the correct answer is "All of the above".

Which of the following types of fossils are formed when mineral replaces all parts of the organism and entire animal transformed into stone?

biology origin and evolution of life fossilization geological time scale, extinctions and fossils concepts of evolution

  1. Petrified fossils

  2. Mould and cast

  3. Actuals remains

  4. All of the above

Show answer
Correct Option: A
Explanation:

Petrified fossils:- In geology, petrifaction or petrification is the process by which organic material becomes a fossil through the replacement of the original material and the filling of the original pore spaces with minerals.

Example:- Dinosaur bones, petrified wood and many trilobite fossils.
So, the correct answer is "Petrified fossils".

............ is a process of fossilisation that occurs when an organism is buried.

biology origin and evolution of life fossilization geological time scale, extinctions and fossils concepts of evolution

  1. Humification

  2. Permineralization

  3. Vermicomposting

  4. None of the above

Show answer
Correct Option: B
Explanation:

Permineralization:- A process of fossilization in which mineral deposits form internal casts of organisms. Carried by water, these minerals fill the spaces within organic tissue.

This occurs when the pores of the plant materials, bones, and shells are impregnated by mineral matter from the ground, lakes, or ocean. In some cases, the wood fibers and cellulose dissolve and some minerals replace them.
So, the correct answer is "Permineralization".

The oldest fossil record of blue-green alga is 2.9 billion years old. It is :

biology origin and evolution of life fossilization geological time scale, extinctions and fossils concepts of evolution

  1. Stromatolites

  2. Archaeopteryx

  3. Archaeospheroides

  4. Chlamydomonas

Show answer
Correct Option: C

K - T boundary is boundary present between rocks of

biology origin and evolution of life fossilization geological time scale, extinctions and fossils concepts of evolution

  1. Devonian and carboniferous

  2. Permian and triassic

  3. Cretaceous and tertiary

  4. Miocene and pliocene.

Show answer
Correct Option: C

In which era did the Himalayas and Alps emerge

biology origin and evolution of life fossilization geological time scale, extinctions and fossils concepts of evolution

  1. Beginning of coenozoic

  2. Middle mesozoic

  3. Early palaeozoic

  4. Late palaeozoic.

Show answer
Correct Option: A