A baby has been born with a small tail. It is a case exhibiting

1. retrogressive evolution

2. mutation 

3. atavism

4. metamorphosis.

Potato and sweet potato 

(1) have edible parts which are homologous organs

(2) have edible parts which are analogous organs

(3) have been introduced in India from the same place

(4) are two species of the same genus.

"Homo sapiens" implies

(1) Human race

(2) Human beings

(3) Modern man

(4) None of these

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) $400°\mathrm{C}$