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प्रश्न
Complete the following diagram:
उत्तर
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संबंधित प्रश्न
“Two areas of study namely 'evolution' and 'classification' are interlinked'. Justify this statement.
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
Which one of the following pairs of vegetables is an example of homologous structures?
(A) Potato and sweet potato
(B) Carrot and radish
(C) Carrot and tomato
(D) Tomato and radish
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
Explain the terms analogous and homologous organs with examples.
How do homologous organs help in providing evidence for organic evolution?
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
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
There are five animals A, B, C, D and E. The animal A uses its modified forelimbs for flying. The animal B uses its forelimbs for running whereas the animal C uses its forelimbs for grasping. The animal D can live on land as well as in water and uses its forelimbs to prop up the front end of its body when at rest. The animal E which respires by using spiracles and tracheae uses wings for flying but its wings are analogous to the modified forelimbs of animal A.
(a) What could the animals A, B, C, D and E be?
(b) Why are the forelimbs of animals A, B, C, D called homologous organs?
(c) What does the existence of homologous organs in animals A, B, C and D tell us about their ancestors ?
(d) Why are the modified forelimbs of animal A and the wings of animal E called analogous organs?
(e) State whether animals A and E have a common ancestor or not.
What do we call the degenerated or partially developed useless organs in living organisms? Enlist such organs in human body? How the same organs are useful in other animals?
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
With the help of diagrams, describe emasculation and bagging.
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
Explain any three molecular (genetic) evidences in favour of organic evolution.
Differentiate between connecting links and the missing links.
Answer the following question:
What are homologous structures? Give an example. Is it necessary that homologous structures always have a common ancestor? Justify your answer.
Similarities in the initial stages indicate the _______ evidence.
Find an odd one out.
Find an odd one out.
The decaying process of C-14 occurs continuously in dead organisms only.
Write a short note:
Embryological evidences
Write the answers to the questions by observing the figure below.
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 |
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| (a) | (b) | (c) |
- Write the name of the animal ‘(a)’ in the figure.
- Write the name of the animal ‘(b)’ in the figure.
- Write the name of the animal ‘(c)’ in the figure.
- Which evolutionary evidence is illustrated by this figure?
- Write the definition of that evidence for evolution.
Biogenetic law states that ______.
Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.
Select the CORRECT match.
Why do all the gametes formed in human females have an X chromosome?
Tendons and ligaments are examples of ______.
Palaeontological evidence for evolution refers to the ______.
Study of fossils is ______.
Evolutionary convergence is the development of:
Animal husbandry and plant breeding programmes are the examples of ______.
Appearance of antibiotic-resistant bacteria is an example of ______.
How do we compute the age of a rock?
Complete the following chart:
What is the function of the appendix of our digestive system?
Define the term:
Homologous organs
Give examples of homologous organs and analogous organs in plants.
