Question

(a) America
(c) Australia
(b) Africa
(d) Antarctica
3. The human species has genetic roots in:
4. State whether the following statement is true or false :
Human beings have evolved from chimpanzee.
5. State one characteristic which shows that the birds are very closely related to dinosaurs.
Name an animal having rudimentary eyes.
7. Name the various tools of tracing evolutionary relationships which have been used for studying
8. Name five varieties of vegetables which have been produced from 'wild cabbage' by the
process of artificial selection.
9. Fill in the following blank with a suitable word:
The evolution of eye is an example of evolution by
10. Name the ancestor of the following:
human evolution.
6.
Broccoli, Kohlrabi, Kale​

Answer 1

Question :

3. The human species has genetic roots in:

(a) America

(c) Australia

(b) Africa

(d) Antarctica

Answer :

• Humans have genetic roots in Africa.

• Homo erectus evolved from Apes and diversified into different species.

• It's estimated that Homo erectus called the Earth their home for a whopping 2 million years.

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Question :

State whether the following statement is true or false :

Human beings have evolved from chimpanzee.

Answer :

No, humans didn't evolve from chimpanzees they rather share a common ancestor, i.e., Dryopithecus

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Question :

5. State one characteristic which shows that the birds are very closely related to dinosaurs. Name an animal having rudimentary eyes.

Answer :

The closest known avian reptile is the Archeaoptryx.

• Hind limbs of typical birds are used for small scale movement much similar to that in Dinosaurs like Tyrannosaurus.

• A more relevant example would be that, both of the organisms are oviparous.

Planaria has rudimentary eye system.

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Question :

Name the various tools of tracing evolutionary relationships which have been used for studying.

Answer :

How would you trace phylogenetic relationships? Obviously by looking at the remains of the organisms, in this case the fossils.

• Small amounts of DNA are found on fossils which are tested for C14 isotope, which establishes the age of fossil.

• Further sculpting and close inspection of bones can help mark the similarities and differences between organisms, as a result we have homologous and analogous strictures.

• Location of the fossils plays a major role in tracking ancestors. You would be aware that Australia split from Pangea eventually leading to geographical speciation. Ever wondered why Kangaroo houses the joy in its pouch which other mammals give birth to well developed organisms? Change in habitat and conditions.

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Question :

8. Name five varieties of vegetables which have been produced from 'wild cabbage' by the

process of artificial selection.

Answer :

• Broccoli
• Kale
• Cauliflower
• Kohlrabi
• Cabbage

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Question :

9. Fill in the following blank with a suitable word:

The evolution of eye is an example of evolution by _______.

Answer :

Natural selection is the reason behind evolution of eye.

• Early invertebrates has just photosensitive cells as eyes.

• More complex invertebrates have a psudo eye or a complete eye.

• Vertebrates have complete eyes.

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Question :

10. Name the ancestor of following : Humans

Answer :

• Earliest recognised human ape ancestors are Dryopithecus, Ramaepithecus and Australopithecus.

• Homo habilis followed by Homo erectus

• Homo erectus evolved into Homo Neanderthals, Homo soloensis, Homo florosiensis, Homo denosova etc

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