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Question
Write the names of those animals in whom the human body organs are functioning.
Solution
It is useful in monkeys and other animals like rabbits, cows, horses, etc. for movement of the ear pinna.
RELATED QUESTIONS
(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.
With the help of any two suitable examples explain the effect of anthropogenic actions on organic evolution.
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Analogous organs
Out of bacteria, spider, fish and chimpanzee, which organism has a better body design in evolutionary terms? Give reason for your answer.
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?
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.
Identify the following pairs as homologous and analogous organs:
(i) Sweet potato and potato
(ii) Eye of octopus and eye of mammals
(iii) Thorns of Bougainvillaea and tendrils of Cucurbits
(iv) Fore limbs of bat and whale
Explain with suitable examples importance of anatomical evidence in evolution.
Explain the importance of Anatomical evidences with examples.
Find an odd one out.
Find an odd one out.
Find an odd one out.
Appendix : vestigial organ : : Peripatus : ____________
Match the following.
| Column A | Column B |
| 1) Morphological evidences | a) Tail-bone or wisdom teeth |
| 2) Paleontological evidences | b) Leaf venation |
| c) Fossils |
Give scientific reason.
Vertebrates have slowly originated from invertebrates.
Which evidence of evolution is shown in the given picture? Explain the importance of this evidence.
Observe the following images and answer the questions.
- Which evolutionary evidences are indicated in the given picture?
- How are they formed?
- Which method is used to measure their age or their time?
Biogenetic law states that ______.
The degenerated and non-functional organs found in an organism are called ______.
A human hand, a front leg of a cat, a front flipper of a whale and a bat’s wing look dissimilar and adapted for different functions. What is the name given to these organs?
Why do all the gametes formed in human females have an X chromosome?
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:
Cucurbits do not develop thick and woody stem as they are:
Study of fossils is ______.
Flippers of Penguins and Dolphins are examples of:
Organs having similar functions but different origin and development are known as:
Which of the following is used as an atmospheric pollution indicator?
The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because ______.
What were the characteristics of life forms that had been fossilised?
How do we compute the age of a living tree?
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
What is the function of the appendix of our digestive system?
Define the term:
Homologous organs
Industrial melanism was highlighted by ______.
