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प्रश्न
Find out from newspapers and popular science articles any new fossil discoveries or controversies about evolution.
उत्तर
Fossils are the remains or signs of ancient organisms obtained from rocks. The study of fossils is called Palaeontology, i.e. in palaeontology, the remains of organisms from millions of years ago are studied. The study of fossil scientists makes it clear that what kind of organisms were present on earth in which period. Fossils buried in rocks and earth's crust are dug out. The structure of organisms is imagined from these signs or remains.
By determining the age of rocks, scientists can also determine the estimated age of fossils. Therefore, scientists consider fossils strong evidence of biological evolution. The most familiar examples of fossils are Archaeopteryx and dinosaurs. Dinosaurs were giant reptiles that ruled the earth during the Mesozoic era, which is called the golden age of reptiles.
Fossils of different types of organisms have been found in rocks of different ages, probably buried in them during the formation of that rock. They represent extinct organisms, which makes it clear that the form of life on earth has been changing. Fossils of some human-like bones have been found in Ethiopia and Tanzania. The history of human evolution has been known from the fossils of human ancestors.
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संबंधित प्रश्न
Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution?
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Fossils
The forelimbs of a frog, a bird and a man show the same basic design (or basic structure) of bones. What name is given to such organs?
The organs which perform similar functions but have different basic structure are called :
(a) asymmetric organs
(b) analogous organs
(c) homologous organs
(d) homophonic organs
The presence of which of the following types of organs in two organisms indicates that they are derived from the same ancestor?
(a) analogous organs
(b) respiratory organs
(c) digestive organs
(d) homologous organs
The organs P and Q of two animals have different structures but similar functions. On the other hand, the two organs R and S of two other animals have the same basic structure but different functions.
(a) What are the organs like P and Q known as?
(b) Name the organs like P and Q. Also name the animals which have such organs.
(c) What are the organs like R and S called?
(d) Name the organs like R and S. Also name the animals which have such organs.
What do we call the degenerated or partially developed useless organs in living organisms? Enlist such organs in human body? How the same organs are useful in other animals?
Answer the following question.
Wisdom teeth : Vestigial organs :: Lungfish : ....................
With the help of diagrams, describe emasculation and bagging.
Very short answer question.
What are homologous organs?
I am a connecting link between reptiles and mammals. Who am I?
Name the parts shown in the diagram.
Human jaw
Give scientific reason.
Peripatus is said to be the connecting link between Annelida and Arthropoda.
Where is carbon dating used?
The process of mating of individuals, which are more closing related than the average of the population to which they belong is called ______.
The presence of gill slits, in the embryos of all vertebrates, supports the theory of ______.
Which is not a vestigial organ in a man?
How do we compute the age of a rock?
Evolutionary convergence is the development of a ______.
