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प्रश्न
What are fossils ?
उत्तर
Fossils are the dead remains of plants and animals that are embedded in sedimentary rocks, preserved and petrified.
संबंधित प्रश्न
Describe in brief two methods of determining the age of fossils.
State any one role of fossils in the study of the process of evolution.
Explain the importance of fossils in deciding evolutionary relationships.
The fossil trilobite was originally :
(a) an arthropod
(b) an invertebrate
(c) a reptile
(d) an ave
Some of the important fossils which have been studied are those of organisms X, Y and Z. X were marine arthropods which were common between 400 to 600 million years ago. Y were the invertebrate animals (molluscs) with a flat, coiled, spiral shell which lived in the sea about 180 million years ago. Z are the extinct carnivorous or herbivorous reptiles which appeared on the earth about 250 million years ago and became extinct about 65 million years ago. What are X, Y and Z?
What are fossils? How are fossils formed and how is their age determined? State the importance of fossils in the study of evolution.
Paleontologists deal with ______.
Birds have evolved from reptiles.
Why is Archaeopteryx considered to be a connecting link?
