Q6 of 40 Page 13

Sequentially arrange the different species of man from primitive to modern man.

(Neanderthal man, Homo habilis, Homo erectus, Homo sapiens)

Sequentially arrange of the different species of man from primitive to modern man are as follow—


Homo habilis


Homo erectus


Neanderthal man


Homo sapiens


Homo habilis


They are the first human-like. Their brain capacity was 600-800 cc. They did not eat meat and their fossils found in Africa. Appeared about 2 million years ago.


Homo erectus


They are also known as Java man. They ate meat and their brain capacity was 900 cc. Appeared about 1.5 million years ago.


Neanderthal mam


Their brain capacity is 1400 cc. They used hides to protect their body and buried their dead. Appeared about 100,000 years ago.


Homo sapiens


They are the modern man. They started human civilization, agriculture and cave art. Appeared about 50,000 years ago.


More from this chapter

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4

Here are certain important hereditary jargons. Fill in the blanks by choosing a suitable one from the list given. (allele, variation, speciation, gene, allelomorphs)

i) __________ are the factors which form the physical basis of inheritance.


ii)__________ is the alternate forms of the same gene.


iii)__________ are the expressions of contrasting pair of alleles.

 5

A change that affects the body cell is not inherited. However, a change in the gamete is inherited. The effects of radiation at Hiroshima have been affecting generations.

Analyze the above statements and give your interpretation.

 7

Biotechnology, the modern science in biology, has helped in producing different types of products. One of the following groups does not have a product of biotechnology.

Pick out and give reasons.


i) enzymes, organic acids, steroids, vaccines


ii) vaccines, enzymes, antibiotics, inorganic acids


iii) antibiotics, hormones, steroids, vaccines


iv) steroids, enzymes, antibodies, vaccines

 8

What do you mean by phenotype and genotype of an individual? Explain.