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Published on: 11/09/2019
Origin and Evolution of Life
Download Tamil Nadu 10th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
The term Ethnobotany was coined by
Khorana
J.W. Harshberger
Ronald Ross
Hugo de Vries
2.
Paleontologists deal with
Embryological evidences
Fossil evidences
Vestigial organ evidences
All the above
3.
The ‘use and disuse theory’ was proposed by __________.
Charles Darwin
Ernst Haeckel
Jean Baptiste Lamarck
Gregor Mendel
4.
Biogenetic law states that ___________
Ontogeny and phylogeny go together
Ontogeny recapitulates phylogeny
Phylogeny recapitulates ontogeny
There is no relationship between phylogeny and ontogeny
5.
The theory of natural selection for evolution was proposed by ____________
6.
The forelimbs of bat and human are examples of ______________ organs.
7.
The characters developed by the animals during their life time, in response to the environmental changes are called ______________.
8.
W.F. Libby
9.
Wood park
10.
Homologous organs
11.
Vestigial organs
12.
Atavism
13.
Which organism is considered to be the fossil bird?
14.
Define Ethnobotany and write its importance.
15.
How do you differentiate homologous organs from analogous organs?
1.
(b)
J.W. Harshberger
2.
(b)
Fossil evidences
3.
(c)
Jean Baptiste Lamarck
4.
(b)
Ontogeny recapitulates phylogeny
5.
( )
Charles Darwin
6.
( )
homologous
7.
( )
acquired character
8.
Radiocarbon dating
9.
Thiruvakkarai
10.
A forelimb of a cat and a bat’s wing
11.
Caudal vertebrae and vermiform appendix
12.
Rudimentary tail and thick hair on the body
13.
Archaeopteryx.
14.
(i) Ethnobotany is the study of a region's plants and their practical uses through the traditional knowledge of the local culture of people.
Importance of Ethnobotany :
(i) It provides traditional uses of plant.
(ii) It gives information about certain unknown and known useful plants.
(iii) The ethnomedicinal data will serve as a useful source of information for the chemists, pharmacologists and practitioners of herbal medicine.
(iv) Tribal communities utilize ethnomedicinal plant and prepare medicine to cure many diseases.
15.
| S.No | Homologous organs | Analogous organs |
| (i) | The homologous organs are those which have been inherited from common ancestors with similar developmental pattern in embryos. |
The analogous organs look similar and perform similar function but they have different origin and developmental pattern. |
| (ii) | The fore limbs of mammals are homologous structures. | The wings of a bird, wings of a bat wings of an insect are similar. |
| (iii) | The mode of development and basic structure of bone is similar. |
The development is similar, but their bone structures are different. |
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
