Evolutionary Biology Internal Exam  S.Y.B.Sc.                        Dr.Pawar M.B.
INTERNAL EXAM

All question compulsory
Each question carry one mark
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1.Later, around ………….. Billion years ago, multicellular organisms began to appear, with differentiated cells  performing  specialized functions
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2..Animals with a front and a back - Bilateria, appeared by 555 million years ago.
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3.Life on Earth is based on carbon and water
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4. Ribozymes remain as the main components of---------
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5.Evidence suggests the first RNA molecules formed on Earth prior to 4.17 billion years ago.
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6.The ……..has the same composition as Earth's crust but does not contain an iron-rich core like the Earth's.
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7.Process of selection of organisms with favorable variations is called
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8.-------- production leads to struggle for existence.
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9.The formation of new species is called
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10.In--------- selection man selects the animals and plants with desirabl characters
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11.states that each cell of the body produces minute particles called pangenes or gemmules.
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12.Remains or impressions of animals and plants have been found in rocks, mud snow orsoft sediments are called
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13.The organisms only fossilized when they are suddenly buried in the silt of
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14.The branch of biology involving the study of fossils and the past conditions of the earth ispalacontology.
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15.Some of the best fossils are formed in amber, which is a fossil resin.
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16.Amber, a fossil resin from pineapple trees, especially
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17.Another group of fossils are the natural in which neither the material nor the minute structure is preserved.
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18.In evolutionary terms, differences between closely related organisms are termed as
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19.When one population of a species differs from the other, it can be termed as …….variation
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20. Variations that can be measured in size or weight called as variations
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21.……………..variations are produced in the body due to the effect of environment
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22.--------- variations are restricted to somatic part of the body of variant
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23…………variations are occur in genes.
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24.Study of speciation helps to understand the process of………….
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25.Gradual speciation is the gradual -…….. of populations until they have reached the levels of specific distinctness.
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26.When two related populations occupy geographically or spatially separated areas, they are called --------- populations
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27.The evolution of allopatric populations into separate species is called allopatric -----
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28.When two populations occupying side by side evolve into two separate species thespeciation is called ------- speciation
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29.generally  refers to evolution above the species level
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30.Macroevolution produces groups of parallel special - ………..among divergent but related stock.
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31.…………….. structures that may have diverged due to different selective pressures, but which continue to share similarities due to common ancestry.
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32..………..structures which have converged in multiple lineages to perform a similar function, but which are dissimilar in origin.
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33.. ---------selection is the directional (non-natural) outcome. selection imposed on a species by humans, for a desired (non-natural) outcome
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34.Charles Darwin visited these islands in
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35.A "mass extinction" can be defined as a time period in which a large percentage of all known species living at the time goes extinct, or is completely wiped out.
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36...………….. defined as the complete disappearance of a species when the last of its individual                                 dies off.
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37.If one species suffers and goes extinct, it often means changes for ---- species
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38.The largest mass extinction event occurred around million years ago, when perhaps95 percent of all species went extinct.
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39.The largest mass extinction event occurred around 250 million years ago, when perhaps -percent of all species went extinct.
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40.Was the modern horse
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