CBSE Class 10 Science Origin And Evolution Of Life Assignment

Question. The theory of Natural selection of Darwin to explain organic evolution was based on
(a) modification in organs through used and disuse
(b) probability of reproduction, struggle for existence and survival of the fittest
(c) Inheritance of acquired characters
(d) appearance of sudden large variations, then inheritance and survival of those having these variations

Answer: B

Question. Connecting link between Reptiles and Birds is
(a) dimetrodon
(b) dodo
(c) archaeopteryx
(d) sphenodon

Answer: C

Question. Which one of these is likely to have been absent in free form at the time of origin of life ?
(a) Oxygen
(b) Hydrogen
(c) Ammonia
(d) Methane

Answer: A

Question. Analogous organs are those which are
(a) structurally similar
(b) functionally similar
(c) structurally as well as functionally similar
(d) normally non-functional

Answer: B

Question. The term evolution in Biology means that
(a) fossils are old
(b) life began in Sea
(c) living things constantly change
(d) none of the above

Answer: C

Question. The idea of “Survival of fittest” was given by
(a) Darwin
(b) Herbert Spencer
(c) Lamarck
(d) Devries

Answer: A

Question. Fossils are dated now by
(a) stratigraphic position
(b) amount of calcium residue
(c) association with other animals
(d) radioactive carbon contents

Answer: D

Question. The famous book “Origin of Species” was written by Charles Darwin in
(a) 1809
(b) 1859
(c) 1885
(d) 1871

Answer: B

Question. Which one is not a vestigial organ in man ?
(a) Vermiform appendix
(b) Plica seminualris
(c) Ear muscles
(d) Epiglottis

Answer: D

Question. Charles Darwin toured in a ship for five years it was
(a) Vikrant
(b) Phillips
(c) Alexander
(d) Beagle

Answer: D

Question. Who wrote the “Origin of Species” ?
(a) G.J. Mendel
(b) Lamarck
(c) De-Vries
(d) Charles Darwin

Answer: D

Question. Nucleoprotein gave most probably the first sign of
(a) life
(b) amino acid
(c) soil
(d) sugar

Answer: A

Question. When as organ is used it will develop and it is not used, it weakens to become vestigial. Who could have said this theory ?
(a) Darwin
(b) De-Vries
(c) Lamarck
(d) Mendel

Answer: C

Question. Homologus structures have
(a) similar origin & dissimilar function
(b) dissimilar origin but similar function
(c) structurally as well as functionally similar
(d) normally non-functional

Answer: A

Question. An experiment to prove that organic compounds were the basis of life, was performed by
(a) Oparin
(b) Miller
(c) Melvin
(d) Fox

Answer: B

Question. According to one of the most accepted theory the earth atmosphere before any life has originated consisted of water vapour, hydrogen, NH₃ and
(a) methane
(b) nitrogen
(c) oxygen
(d) carbondioxide

Answer: A

Question. Evolution is the best defined by
(a) inheritance of acquired characters
(b) descent by modifications
(c) spontaneous generation
(d) struggle for existence

Answer: B

Question. Origin of life is due to
(a) spontaneous generation
(b) God’s will
(c) effect of sun rays on mud
(d) chemical evolution

Answer: D

Question. Fossils are
(a) fovea in the retina of vertebrate eye
(b) remains of organisms presents in the rocks
(c) the fossa present in the bones
(d) foramens through which nerves pass

Answer: B

Question. According to the Neo-Darwinian theory which of the following is responsible for the origin of new species?
(a) Mutations
(b) Useful variations
(c) Mutations together with natural selection
(d) Hybridization.

Answer: C