Wings of pigeon, mosquito and bat show

1. divergent evolution 

2. atavism

3. convergent evolution 

4. all of these 

Homo erectus evolved during

(1) pleistocene           

(2) miocene

(3) pliocene                 

(4) holocene

Which of the following postulates is related with Neo-Darwinism?

(1) Mutations are believed to help form new species.

(2) It incorporates isolation as an essential component of evolution.

(3) It can explain the occurrence of unchanged forms over millions of years.

(4) All of the above.

Which of the following statements is correct?

(1) Lion and leopard show convergent evolution

(2) Cryptic camouflage is seen in Biston betularia.

(3) Natural selection is responsible for the extinction of dinosaurs

(4) Homo habilis and Homo erectus are closely related.

Which one the following evidences does not favour the Lamarckian concept of inheritance of acquired characters?

(1) Absence of limbs in snakes

(2) Melanization in peppered moth

(3) Presence of webbed toes in aquatic birds

(4) Lack of pigment in cave-dwelling animals 

The extinct human ancestor, who ate only fruits and hunted with stone weapons was

(1) Ramapithecus

(2) Australopithecus

(3) Dryopithecus

(4) Homo erectus

In Miller's experiment, he used a mixture of CH₄, NH₃, H₂ and water vapour in a closed flask to mimic early earth conditions. What was the temperature at which this flask was kept?

(a) $800°\mathrm{C}$

(b) $1200°\mathrm{C}$

(c) $200°\mathrm{C}$

(d) $400°\mathrm{C}$

Which of the following is reptilian ancestor of birds?

(1) Hesperornis

(2) Ichthyornis

(3) Archaeopteryx

(4) Lycaenops

The correct sequence of stages in the evolution of modern man (Homo sapiens), is

(1) Homo erectus, Australopithecus, neanderthal man, cro-magnon man, modern man

(2) Australopithecus, Homo erectus, neanderthal man, cro-magnon man, modern man

(3) neanderthal man, Australopithecus, cro-magnon man, Homo erectus, modern man

(4) Australopithecus, neanderthal man, cro-magnon, Homo erectus, modern man

Documented microfossils have been found that are as old as

(1) 2.5 billion years

(2) 3.5 billion years

(3) 1.5 billion years

(4) 2.5 billion years