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Chapters
2: Optics
3: Thermal Physics
4: Electricity
5: Acoustics
6: Nuclear Physics
7: Atoms and Molecules
8: Periodic Classification of Elements
9: Solutions
10: Types of Chemical Reactions
11: Carbon and its Compounds
12: Plant Anatomy and Plant Physiology
13: Structural Organisation of Animals
14: Transportation in Plants and Circulation in Animals
15: Nervous System
16: Plant and Animal Hormones
17: Reproduction in Plants and Animals
18: Genetics
▶ 19: Origin and Evolution of Life
20: Breeding and Biotechnology
21: Health and Diseases
22: Environmental Management
23: Visual Communication
![Samacheer Kalvi solutions for Science [English] Class 10 SSLC TN Board chapter 19 - Origin and Evolution of Life - Shaalaa.com](/images/science-english-class-10-sslc-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Science [English] Class 10 SSLC TN Board chapter 19 - Origin and Evolution of Life")
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Solutions for Chapter 19: Origin and Evolution of Life
Below listed, you can find solutions for Chapter 19 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Science [English] Class 10 SSLC TN Board.
Samacheer Kalvi solutions for Science [English] Class 10 SSLC TN Board 19 Origin and Evolution of Life Evaluation [Pages 282 - 284]
Choose the correct answer
Biogenetic law states that ______.
Ontogeny and phylogeny go together
Ontogeny recapitulates phylogeny
Phylogeny recapitulates ontogeny
There is no relationship between phylogeny and ontogeny
The ‘use and disuse theory’ was proposed by ______.
Charles Darwin
Ernst Haeckel
Jean Baptiste Lamarck
Gregor Mendel
Paleontologists deal with ______.
Embryological evidences
Fossil evidences
Vestigial organ evidences
All the above
The best way of direct dating fossils of recent origin is by ______.
Radio-carbon method
Uranium lead method
Potassium-argon method
Both (a) and (c)
The term Ethnobotany was coined by ______.
Khorana
J.W. Harsbberger
Ronald Ross
Hugo de Vries
Fill in the blanks
The characters developed by the animals during their life time, in response to the environmental changes are called ______.
The degenerated and non-functional organs found in an organism are called ______.
The forelimbs of bat and human are examples of ______ organs.
The theory of natural selection for evolution was proposed by ______.
State true or false. Correct the false statements
The use and disuse theory of organs’ was postulated by Charles Darwin.
True
False
The homologous organs look similar and perform similar functions but they have different origin and developmental pattern.
True
False
Birds have evolved from reptiles.
True
False
Match the following
| Column A | Column B | |
| a) | Atavism | caudal vertebrae and vermiform appendix |
| b) | Vestigial organs | a forelimb of a cat and a bat’s wing |
| c) | Analogous organs | rudimentary tail and thick hair on the body |
| d) | Homologous organs | a wing of a bat and a wing of an insect |
| e) | Wood park | radiocarbon dating |
| f) | W.F. Libby | Thiruvakkarai |
Answer in a word or sentence
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?
Which organism is considered to be the fossil bird?
What is the study of fossils called?
Short answers questions
The degenerated wing of a kiwi is an acquired character. Why is it an acquired character?
Why is Archaeopteryx considered to be a connecting link?
Define Ethnobotany and write its importance.
How can you determine the age of the fossils?
Long answer questions
Natural selection is a driving force for evolution-How?
How do you differentiate homologous organs from analogous organs?
How does fossilization occur in plants?
Higher Order Thinking Skill (HOT)
Arun was playing in the garden. Suddenly he saw a dragon fly sitting on a plant. He observed the wings of it. He thought it looked similar to a wing of a crow. Is he correct? Give reason for your answer.
Higher Order Thinking Skill (HOT)
Imprints of fossils tell us about evolutionHow?
Higher Order Thinking Skill (HOT)
Octopus, cockroach and frog all have eyes. Can we group these animals together to establish a common evolutionary origin. Justify your answer.
Solutions for 19: Origin and Evolution of Life
Samacheer Kalvi solutions for Science [English] Class 10 SSLC TN Board chapter 19 - Origin and Evolution of Life
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Concepts covered in Science [English] Class 10 SSLC TN Board chapter 19 Origin and Evolution of Life are The Universe, Theories of Origin of Life, Darwinism, Variation, Chemical Evolution of Life (Self-assembly Theory of the Origin of Life), Lamarck’s Theory of Evolution, Paleobotany, Ethnobotany, Astrobiology/Exobiology, Evidences for Biological Evolution.
Using Samacheer Kalvi Science [English] Class 10 SSLC TN Board solutions Origin and Evolution of Life exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Samacheer Kalvi Solutions are essential questions that can be asked in the final exam. Maximum Tamil Nadu Board of Secondary Education Science [English] Class 10 SSLC TN Board students prefer Samacheer Kalvi Textbook Solutions to score more in exams.
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