By what Latin name, is the first human-like being, the hominid known?

1

(a)

Homo habilis is the first hominid.

Who probably did not eat meat among Ramapithecus, Australopithecus and Homo habilis?

1

(a)

Homo habilis probably did not eat meat.

What are the characteristics of life forms that had been fossilised?

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(a)

1. Possession of hard parts like bones, teeth, shell, venation of leaves ect.,
2. Burial in a medium where no oxidation of the material occurs.

Did aquatic life forms got fossilized? If yes, where do we come across such fossils?

1

(a)

Yes, the aquatic life has more chances of being fossilised as their dead bodies are buried in the sedimentary rocks. We come across such fossils when the sedimentary rocks are exposed due to drastic changes in the crust of the earth.

When we talk of functional macro-molecules e.g. protein as enzyme, hormones, receptor, antibodies, ect., towards what are they evolving?

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(a)

They are evolving towards different functions among diverse organism and evolving into complex organism.

Who among the Dryopithecus and Ramapithecus was more man-like?

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(a)

• Ramapithecus was more human-like. They walked erect on their hind legs. ate hard nuts and seeds like modern man and had jaws and teeth similar to humans.
• They arose from Dryopithecus, which was considered to be a conmon ancestor of human and apes. Dryopithecus was more ape-like and had same length of arms and legs.

What is the probable period of origin of cyanobacteria?

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(a)

About 3.3 to 3.5 billion years ago.

Cite one example of homologous organs in plants.

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(a)

Thorns of Bougainvillea and tendrils of passiflora.

Name any two breeds of wild rock pigeon that have been developed through artificial selection.

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(a)

Pouter, fan tail and jacobin.

What is the way to compute the age of a fossil?

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(a)

Radiocarbon dating is one of the way to compute the age of a fossil.