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Evolution
Question
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Try to trace the components of human evolution.

Answer

During human evolution, ancestral human types had undergone a number of remarkable changes in their brain size (cranial cavity), skeletal features, dietary preference, etc., as shown in the following table :

Human type

Cranial cavity

Skeletal features

Dietary preference

(i) Australopithecus

(ii) Homo habilis
(iii) Homo erectus
(iv) H. sapiens neanderthalensis

(v) H.sapiens fossilis

(vi) H. sapiens sapiens

600 cm3

735 cm3(650 - 800 cm3)
870 cm3(750 - 900 cm3)
1400 cm3(1300 -1600 cm3)

1660 cm3 
1450 -1650 cm3

Prognathous, well developed
supra-orbital ridges and
chinless

-do-

-do-

- do-

Flat forehead, no supraorbital ridges, chin present.
-do-

Primarily fruit-feeder but also hunted with stones.

Primarily herbivorous. Primarily a meateater. Primarily carnivorous.

Primarily carnivorous Primarily omnivorous.

 

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Some More Questions From Evolution Chapter

Mention the type of nutrition in the cells originated first during the origin of life.

Which group of organisms were responsible for appearance of free oxygen in the atmosphere of the primitive earth ?

What is meant by the term fossil ?

What is the type of evolution in which the same structure developed along different directions due to adaptations to different needs ?

Name the different eras of geologic time scale.

What is single step large mutation?

Consider a thorn in Bougainvillea and a tendril in cucurbita. Are these two organs homologous or analogous ? Give reason.

Give two examples that represent adaptive radiation.

Which theory attempts to explain to us the origin of universe?

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