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प्रश्न
_______ is a connecting link between Annelida and Arthropoda.
विकल्प
Duck-billed platypus
Peripatus
Lungfish
Whale
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उत्तर
Peripatus is a connecting link between Annelida and Arthropoda.
APPEARS IN
संबंधित प्रश्न
Mammals : _________ : : Amphibia : Fishes
State the connecting links between Peripatus with Annelida and Arthopoda.
(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.
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Homologous organs
With the help of any two suitable examples explain the effect of anthropogenic actions on organic evolution.
Attempt giving a clear definition of the term species.
Name any two temporary embryonic structures in vertebrates which provide evidence for evolution.
Differentiate between analogous and homologous structures.
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
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
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?
Vestigial organ ______ present in human body is proof of 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
Explain any three molecular (genetic) evidences in favour of organic evolution.
Define fossil.
Define phylogeny.
What are homologous structures?
Similarities in the initial stages indicate the _______ evidence.
______ is a vestigial organ in human beings.
The decaying process of C-14 occurs continuously in dead organisms only.
What is carbon dating?
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.
Where is carbon dating used?
Palaeontological evidence for evolution refers to the ______.
Which of the following is used as an atmospheric pollution indicator?
Fossils are generally found in ______.
How do we compute the age of a living tree?
Give an example for convergent evolution and identify the features towards which they are converging.
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.
Give a scientific reason.
Morphological evidences suggest that dog, sheep and wolf have a common origin.
Find odd one out:
As shown in figure below some organisms that share a common ancestor have features that have different functions, but similar structures.
These are known as ______. Give example.
Write avian characters of Archaeopteryx.
Write names of some vestigial organs in the human body.
