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प्रश्न
Define fossil.
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उत्तर
Large number of organisms get buried due to disasters like floods, earthquakes, volcanoes, etc. Remnants and impressions of such organisms remain preserved underground. These are called fossils.
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संबंधित प्रश्न
(a) Select the homologous structures from the combinations given below:
(i) Forelimbs of whales and bats
(ii) Tuber of potato and sweet potato
(iii) Eyes of octopus and mammals
(iv) Thorns of Bougainvillea and tendrils of Cucurbita
(b) State the kind of evolution they represent.
Differentiate between analogy and homology giving one example each of plant and animal respectively.
Name any two temporary embryonic structures in vertebrates which provide evidence for evolution.
Human tailbone is a vestigial organ. Explain.
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
“Appearance of melanised moths post-industrialisation in England is a classic example of evolution by natural selection.” Explain.
Draw a labelled diagram of T.S. of a leaf showing Kranz anatomy.
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
What are homologous structures?
The decaying process of C-14 occurs continuously in dead organisms only.
Which evidence of evolution is shown in the given picture? Explain the importance of this evidence.
The fossil remains of Archaeopteryx is a connecting link between ______
Cucurbits do not develop thick and woody stem as they are:
The process of mating of individuals, which are more closing related than the average of the population to which they belong is called ______.
Which is not a vestigial organ in a man?
What are we referring to? When we say 'simple organisms' or 'complex organisms'.
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
Write avian characters of Archaeopteryx.
Give one example of homologous organs found in plants.
