CBSE
Multiple Choice QuestionsWhich 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.
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 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
Homo erectus evolved during
pleistocene
miocene
pliocene
holocene
Delicate hair-like feathers which remain sparsely distributed over the body are
coverts
filoplumes
plumules
remiges
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
The extinct human ancestor, who ate only fruits and hunted with stone weapons was
Ramapithecus
Australopithecus
Dryopithecus
Homo erectus.
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
Select the correct sequence for Homo erectus
Erectus homo primata chordata animalia
Homo erectus primata animalia chordata
Homo erectus primata chordata animalia
Erectus homo animalia primatachordata
