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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
With the help of any two suitable examples explain the effect of anthropogenic actions on organic evolution.
State a reason for the increased population of dark coloured moths coinciding with the loss of lichens (on tree barks) during industrialization period in England.
Four students P, Q, R and S differently reported the following set of organs to be analogous :
P. Forelimb of a frog and forelimb of a lizard
Q. Forelimb of a bird and forelimb of a human
R. Wings of a parrot and wings of a butterfly
S. Wings of a bird and wings of a bat
The two students who have reported correctly are :
(A) P and Q
(B) Q and R
(C) R and S
(D) P and S
Enlist any four sequential evolutionary names of human ancestors.
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Fossils
Explain the evolution of giraffe's neck according to Lamarck's theory of evolution.
One pair of organs in the following animals are not homologous. This is :
(a) forelimbs in humans and lizard
(b) forelimbs in lizard and frog
(c) wings in butterfly and bat
(d) wings in bat and bird
X, Y, and Z are three animals. The animal X can fly but animal Y can only run on ground or walls. The forelimbs of animals X and Y have the same basic design but they are used for different purposes such as flying and running respectively. The animal Z became extinct an long time ago. The study of fossils of Z tells us that it had some features like those of X and some like those of Y. In fact, Z is said to form a connecting link in the evolutionary chain of X and Y.
(a) What could the animals X, Y and Z be?
(b) What name is given to the forelimbs like those of X and Y which have the same basic design but different functions?
(c) Name one feature in which Z resembled X.
(d) Name one feature in which Z resembled Y.
(e) Which is the correct evolutionary chain involving X, Y and Z : X → Z → Y or Y → Z → X?
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
Read the following statement and justify same in your own words with the help of suitable example.
There is evidences of fatal science among chordates.
Write the names of those animals in whom some vestigial organs in human body are functioning.
Explain with suitable examples importance of anatomical evidence in evolution.
Observe the picture and answer the following questions.
A) Which evidence of evolution is shown in the picture?
B) What can be proven with this proof?
C) Give one more example of evidence of evolution
Define phylogeny.
Very short answer question:
What is vestigeal organ?
Short answer question.
Give the significance of fossils.
Similarities in the initial stages indicate the _______ evidence.
______ is a vestigial organ in human beings.
Find an odd one out.
Find an odd one out.
I am a connecting link between reptiles and mammals. Who am I?
Appendix : vestigial organ : : Peripatus : ____________
The decaying process of C-14 occurs continuously in dead organisms only.
Give scientific reason.
Peripatus is said to be the connecting link between Annelida and Arthropoda.
Enlist the evidences of evolution.
Observe the given images and answer the following questions.
- Which evolutionary evidence does it indicate?
- What does it prove?
- State another example of evolutionary evidence.
Which of these is not a vestigial organ in human beings?
Evolution has exhibited a greater stability of molecular structure when compared with morphological structures. Comment on the statement and justify your opinion.
Homologous organs are:
Evolutionary convergence is the development of:
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?
Organs having similar functions but different origin and development are known as:
Analogous organs arise due to ______.
Appearance of antibiotic-resistant bacteria is an example of ______.
Fossils are generally found in ______.
Explain divergent evolution in detail. What is the driving force behind it?
Industrial melanism was highlighted by ______.
