GRE Biology Solved MCQs Practice Test Sample Questions

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GRE Biology MCQs Tests

1) The phenomenon in which larva becomes sexually mature.
(a) Retrogressive Metamorphosis
(b) Neoteny
(c) Both ‘a’ and ‘b’
(d) None of these

(2) Amphibians have the following number of chambers in their heart.
(a) 2
(b) 3
(c) 4
(d) 5
(e) None of these

(3) The young are born in less developed condition.
(a) Monotremes
(b) Marsupials
(c) Placentals
(d) None of these

(4) Limbs of Sea Cows and Sea Lions are the product of:
(a) Convergent Evolution
(b) Divergent Evolution
(c) Parallel Evolution
(d) None of these

(5) In these animals the teeth are reduced to molars without enamel or no teeth are present.
(a) Moles
(b) Bats
(c) Sloths
(d) None of these

(6) Only hind limbs are lost in:
(a) Snakes
(b) Whales
(c) Bats
(d) None of these

(7) Among the following which snake is non-poisonous?
(a) Krait
(b) Python
(c) Viper
(d) None of these

(8) Which one is excluded from the Phylum Chordata.
(a) Urochordata
(b) Hemichordata
(c) Cephalochordata
(d) None of these

(9) The earliest known species of birds is:
(a) Archaeopteryx
(b) Hesperornis
(c) Ichthyornis
(d) None of these

(10) A muscular diaphragm helps to move air into and out of the lungs in:
(a) Amphibians
(b) Reptilians
(c) Avians
(d) Mammalians
(e) None of these


(11) In a dihybrid cross, the ratio of F2 generation is:
(a) 9:3:3:1
(b) 3:1
(c) 1:2:1
(d) 1:1
(e) None of these

(12) When a single gene has multiple effects, the phenomenon is called:
(a) Codominance
(b) Epistasis
(c) Pleiotropy
(d) Genostasis
(e) None of these

(13) Lamarck’s theory of evolution was published in:
(a) 1807
(b) 1808
(c) 1809
(d) 1810
(e) None of these

(14) The book “Origin of Species” was written by:
(a) Linnaeus
(b) Lamarck
(c) Mendel
(d) Darwin
(e) None of these

(15) The interaction between algae and fungi to form lichen is called:
(a) Parasitism
(b) Mutalism
(c) Commensalism
(d) Amensalism
(e) None of these

(16) The actual location or place where an organism lives is called:
(a) Habitat
(b) Ecosystem
(c) Niche
(d) Biome
(e) None of these

(17) Which of the biomes has been increased in area by human activities?
(a) Savanna
(b) Grassland
(c) Desert
(d) Coniferous forest
(e) None of these

(18) Which zone of the lake ecosystem consists of phyto-and zoo-planktons?
(a) Littoral zone
(b) Limnetic zone
(c) Profundal zone
(d) Water deep layers
(e) None of these

(19) Which of the following is a biotic component of an ecosystem?
(a) Producers
(b) Consumers
(c) Decomposers
(d) All of these
(e) None of these

(20) A sequence of changes in the community structure of an ecosystem over a period of time is called:
(a) Natural selection
(b) Succession
(c) Neo-Darwinism
(d) Lamarckism
(e) None of thes

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