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प्रश्न
Short answer question.
Give the significance of fossils.
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उत्तर
1. Fossils are the dead remains of plants and animals that lived in past in various geological layers.
2. The study of fossils provides the most convincing and direct evidence of evolution.
3. Study of fossils tells us that life forms were not the same millions of years ago (mya).
4. The geological time's scale is based on fossil records.
5. From the fossil records we can trace the complete evolutionary history of animals.
6. Study of fossils is an important aspect of evolution since it can be used in paleontology and anthropology for determining age of the fossils and deducing information about their ancestors.
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संबंधित प्रश्न
Differentiate between analogy and homology giving one example each of plant and animal respectively.
The organs which perform different functions but have the same basic structure are known as :
(a) homologous organs
(b) analogous organs
(c) homolytic organs
(d) analytic organs
Identify the following pairs as homologous and analogous organs:
(i) Sweet potato and potato
(ii) Eye of octopus and eye of mammals
(iii) Thorns of Bougainvillaea and tendrils of Cucurbits
(iv) Fore limbs of bat and whale
In a class, students were asked to observe the models/slides/pictures of the skeletons of forelimbs and wings of different organisms. After the observations the students made the following groups of homologous structures. Select the correct group :
(A) Wings of a bird and a butterfly
(B) Wings of a pigeon and a bat
(C) Wings of a butterfly and a bat
(D) Forelimbs of a cow, a duck and a lizard
Write short notes based upon the information known to you.
Embryology
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
Evolutionary convergence is the development of:
Fossils are generally found in ______.
What are we referring to? When we say 'simple organisms' or 'complex organisms'.
How do we compute the age of a fossil?
