Advertisements
Advertisements
प्रश्न
Define fossil.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Differentiate between homology and analogy. Give one example of each.
Study the following statements:-
I. Wings of birds and wings of bats are homologous organs.
II. Wings of birds and wings of insects are modified forelimbs.
III. Wings of birds and wings of insects are analogous organs.
IV. Wings of birds and forelimbs of horse are homologous organs.
The correct statements are
(A) I and II
(B) II and III
(C) III and IV
(D) I and IV
With the help of any two suitable examples explain the effect of anthropogenic actions on organic evolution.
How analogy and homology considered as an evidence in support of evolution ?
Which of the following is a correct set of homologous organs?
(a) Forelimbs of frog, bird and lizard
(b) Spine of cactus and thorn of bougainvillea
(c) Wings of bat and wings of butterfly
(d) Wings of a bird and wings of a bat
An example of homologous organs is
Explain the terms analogous and homologous organs with examples.
Name the scientists who Discovered the fossil of Australopithecus
What are homologous organs?
Human tailbone is a vestigial organ. Explain.
The presence of which of the following types of organs in two animals indicates that they are not derived from a common ancestor?
(a) homologous organs
(b) excretory organs
(c) analogous organs
(d) reproductive 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.
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.
Vestigial organ ______ present in human body is proof of evolution.
Write short notes based upon the information known to you.
Embryology
Write the names of those animals in whom some vestigial organs in human body are functioning.
Answer the following question.
Wisdom teeth : Vestigial organs :: Lungfish : ....................
“Appearance of melanised moths post-industrialisation in England is a classic example of evolution by natural selection.” Explain.
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
Find an odd one out.
I am a connecting link between reptiles and mammals. Who am I?
Give scientific reason.
Duck-billed platypus shows relationship with mammals.
Explain any five types of evidence that support the theory of evolution.
Select vestigial organs from the following.
Select the correct statement.
Select the CORRECT set of homologous organs.
Define vestigial organs.
Tendons and ligaments are examples of ______.
Basic principles of embryonic development were pronounced by:
Evolutionary convergence is the development of:
Which is not a vestigial organ in a man?
The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because ______.
While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment.
You have studied the story of Peppermoths in England. Had the industries been removed, what impact could it have had on the moth population? Discuss.
Find odd one out:
Find the odd one out:
Write names of some vestigial organs in the human body.
