Which of the following did not evolve from Psilophyton?

  • Ferns

  • Ginkgos

  • Conifers

  • Bryophytes

The flourishing period of progymnosperm is

  • Devonian

  • Silurian

  • Cretaceous

  • Permian

The flourishing period of seed ferns is

  • Jurassic

  • Devonian

  • Carboniferous

  • Triassic

Which of the following was not flourishing in Jurassic period?

  • Herbaceous lycopods

  • Sphenopsids

  • Ferns

  • Conifers

Gnetales evolved from

  • Psilophyton

  • Rhynia type plants

  • Tracheophyte ancestors

  • Chlorophyte ancestors

Mammals evolved from

  • Therapsids

  • Sauropsids

  • Thecodonts

  • Tuataras

Which of the following is not extinct?

  • Pelycosaurs

  • Therapsids

  • Thecodont reptiles

  • Sphenopsids

Sauropsids gave rise to

  • Turtles

  • Mammals

  • Gnetales

  • Ginkgo's

The land reptile which went back into water to evolve into fish like reptiles..

  • Around 250mya e.g. Ichthyosaurs

  • Around 300mya e.g. Therapsids

  • Around 200mya e.g. Ichthyosaurs

  • Around 150mya e.g. Therapsids

Which of the following is not true?

  • Small sized reptiles of dinosaurs of that era still exist today.

  • Tyrannosaurs rex was about 20 feet in height and had hugesome dagger like teeth.

  • Dinosaur extinct, a possible reason may be most of them has evolved into birds

  • Giant ferns fell to form coal deposits very fast

Which of the following feature is not of Ramapithecus?

  • Hairy, walked like gorillas and chimpanzees

  • Existed 15mya

  • Ramapithecus was more man like

  • After its extinction Dryopithecus came into picture.

The man like primates walked in eastern Africa around 3-4 mya. This belief was supported by

  • Hominid features of bones discovered in Ethiopia and Tanzania.

  • Hominid features of bones discovered in Whole Africa

  • Hominid features of bones discovered in Peru.

  • Hominid features of bones discovered in Australia

Which of the following does not hold true for Australopithecus?

  • Existed 2 mya

  • Probably lived in East African grasslands

  • They hunted with stone weapons

  • Ate meat

Which of the following features is not of Homo habilus

  • First human like being

  • 650-800cc brain capacity

  • Did not eat fruit surely

  • Hominid

Fossil discovered in 1891 in Java around 1.5mya with 900cc brain capacity and probably ate meat. These features are associated with

  • Homo erectus

  • Homo habilus

  • Neanderthal

  • Australopithecus

With brain size of 1400cc, lived in near east and central Asia in between 100000 to 40000 years back, dead body burial, use of caves or hides to protect their body

 

  • Homo erectus

  • Homo habilus

  • Neanderthal

  • Australopithecus

Which of the following is not true about Homo sapiens?

  • Agriculture came around 10000 years ago

  • Arose in 75000- 10000 years ago

  • Cave art developed about 18000 years ago

  • Modern man's skull resembles more with adult chimpanzee than baby chimpanzee.

Some of the marsupials of Australia resemble equivalent placental mammals that live in similar habitats of other continents. This is an example of:

  • Convergent evolution

  • Divergent evolution
  • Saltatory evolution
  • Adaptive radiation

A population of an animal is hunted down to only 20 organisms. Later the number is restored to 10,000 organisms, but the variations in this population are highly reduced. This is called:

  • Founder Effect

  • Bottleneck effect

  • Edge effect

  • Heterosis

What is the half life of U238, the radioactive isotope of uranium?

  • 4500 years

  • 4.5 million years

  • 45 million years

  • 4.6 billion years

The earliest known members of the horse family belong to the genus:

  • Hyracotherium                                                             

  • Equus

  • Mesohippus                                                                  

  • Merychippus

In a population of red (dominant) and white flowers, the frequency of red flowers is 91 %. What is the frequency of the red allele?

  • 9 %

  • 30 %

  • 91 %

  • 70 %

 ............... operates to eliminate intermediate phenotypes.

  • Directional selection

  • Disruptive selection

  • Stabilizing selection

  • Random chance

Many bacteria are now resistant to penicillin, because:

  • penicillin causes gene mutations, some of which are beneficial

  • previously resistant forms survived and reproduced better than non-resistant forms

  • the hospital environment inhibits competition among bacteria

  • penicillin triggers the synthesis of resistant proteins

A change in allele frequency within a population, over a succession of generations, is called:

  • microevolution, or adaptive evolution

  • macroevolution, or speciation

  • coevolution

  • phylogenetic evolution

A plant population that reproduces by self - pollination is an extreme example of :

  • the bottleneck effect

  • the founder effect

  • rapid gene flow

  • assortative mating

People who carry an allele for normal hemoglobin and an allele for sickle cell are resistant to malaria. They are examples of:

  • heteozygote advantage

  • extreme diploidy

  • outbreeding

  • recessive superiority

A deleterious allele decreases more rapidly in frequency if it is:

  • recently mutated

  • rare

  • dominant

  • Recessive

Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I                                              Column II

I. Homologous organs                    1. Eye of an octopus and eye of a mammmal

II. Analogous organs                      2. Thorn of Bougainvillea and tendril of Cucurbita

III. Vestigeal organs                       3. Body hair and wisdom teeth in humans
Codes:
       I    II    III
  • .    1     2    3
  • .    3     1    2
  • .    2     1    3
  • .    1     3    2

Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I                                      Column II
(geological period)                       (major event)
I. Ordovician                               1. First vertebrates
II. Carboniferous                         2. Origin of reptiles
III. Jurassic                                 3. Angiosperms appear
IV. Cretaceous                             4. Dinosaurs dominant

Codes:

       

       I   II   III   IV
  • .    1   2    3   4
  • .    2   1    4   3
  • .    2   1    3   4
  • .    1   2    4   3

0:0:1


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Practice Zoology Quiz Questions and Answers