Q. 34.7( 3 Votes )
All the human races like Africans, Asians, Europeans, Americans and others might have evolved from a common ancestor. Provide a few evidences in support of this view.
All human beings have evolved from a common ancestor as they have maximum number of common characters. Moreover, all human beings can interbreed with each other which shows that all of them belong to same species. Some of the common characters of all human beings are –
a. Body hairs.
b. Similar body design.
c. Similar brain size.
d. Ability to handle tools.
e. Ability to communicate.
f. Bipedal locomotion.
g. Highly complex social behaviour.
Rate this question :
After attending a class lecture on evolution, Katy came home and gathered photographs of all her possible relatives and grandparents. Afterward she made a family tree using those photographs in which she was surprised to see her resemblance to most of her relatives and grandparents.
(i) Why was there resemblance seen by Katy to most of her relatives?
(ii) What are the laws of inheritance? Name them.
(iii) What values are shown by Katy?All In One Science
During a science lecture on evolution and inheritance, Amit got confused and went to clear his doubts. He asked, if characters can be passed to the future generation, then why does not he have the tattoo that his mother has on her arm. The teacher smiled and told him about inherited and acquired characters.
(i) What are inherited and acquired characters?
(ii) The tattoo on the arm of Amit’s mother was not present on Amit’s arm. Give a scientific reason.
(iii) What values are shown by Amit?All In One Science
To where can the earliest members of the human species be traced to?All In One Science
Which tools can be used for tracing the evolutionary relationships of human evolution?All In One Science
Write the scientific name imparted to the human species.All In One Science
Name two human traits which show variation.All In One Science
All the human races like Africans, Asians, Europeans, Americans and others might have evolved from a common ancestor. Provide a few evidences in support of this view.NCERT - Science Exemplar
No two individuals are absolutely alike in a population. Why?Science - Board Papers