Select the correct sequence for Homo erectus

• Erectus $\to$ homo $\to$ primata $\to$ chordata $\to$ animalia

• Homo $\to$ erectus $\to$ primata $\to$ animalia $\to$ chordata

• Homo $\to$ erectus $\to$ primata $\to$ chordata $\to$animalia

• Erectus$\to$ homo$\to$ animalia$\to$ primata$\to$chordata

Assertion: Interspecific competition is the only potent force in organic evolution.

Reason: Unexceptionally two closely related species competing for the same resources cannot co-exist indefinitely

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

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

• Ramapithecus

• Australopithecus

• Dryopithecus

• Homo erectus.

The concept of chemical evolution is based on

• interaction of water, air and clay under intense heat

• effect of solar radiation on chemicals

• possible origin of life by combination of chemicals under suitable environmental conditions

• crystallization of chemicals

Delicate hair-like feathers which remain sparsely distributed over the body are

• coverts

• filoplumes

• plumules

• remiges

Homo erectus evolved during

• pleistocene

• miocene

• pliocene

• holocene

107.

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

• Mutations are believed to help form new species

• It incorporates isolation as an essential component of evolution.

• It can explain the occurrence of unchanged forms over millions of years.

• All of the above

By all of the following ways bacteria become resistant to antibiotic except

• making enzymes that inactivate the drug

• becoming impermeable to the drug

• modifying the target of the drug

• moving away from the drug

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

• Absence of limbs in snakes

• Melanization in peppered moth

• Presence of webbed toes in aquatic birds

• Lack of pigment in cave-dwelling animals

Which of the following features can be said to be a true defining feature of living beings without any exception

• They can digest their food.

• All of them can reproduce.

• They can regenerate.

• They can respond to external stimuli.