SCI 115 CHAPTERS 12 & 13

QUESTION 1
  1. Which factor influences radioactive decay?​
a. ​time
b. ​temperature
c. pressure​
d. ​moisture
e. ​chemical bonding

1 points   

QUESTION 2

  1. Over evolutionary time, flowering plants have evolved colors, odors, and nectar that attract pollinating insects, and the insects have evolved mechanisms that detect the changes in plants and to better collect pollen. This is an example of ____.
a. allopatric speciation
b. phylogenetic change
c. coevolution
d. a key innovation
e. sympatric speciation

1 points   

QUESTION 3

  1. Finding an abundance of iridium in the K–Pg boundary sequence worldwide pointed to evidence that this layer was of ____ origin.​
a. carbon​
b. ​organic
c. ​geologically recent
d. ​prehistoric
e. ​extraterrestrial

1 points   

QUESTION 4

  1. ​Mutations that result in the death of the individual are known as ____.
a. ​beneficial
b. ​lethal
c. ​random
d. ​spontaneous
e. ​neutral

1 points   

QUESTION 5

  1. ​Traits with more than two distinct forms are ____.
a. ​polymorphic
b. ​dimorphic
c. ​codominant
d. ​heterozygous
e. ​homozygous

1 points   

QUESTION 6

  1. A female horse can mate with a male donkey, but they will produce a mule that is sterile. This is an example of what type of isolation mechanism?
a. allopatric
b. physical
c. behavioral
d. reproductive
e. geological

1 points   

QUESTION 7

  1. How do exposed layers of sedimentary rock in the Grand Canyon reveal clues about the geologic time scale?
a. The chemical composition of each layer indicates the conditions on Earth when the layer was deposited.
b. Fossils of soft-bodied animals are prevalent in sedimentary rock.
c. Radiometric dating using 14C of fossils in each layer can accurately predict their age up to 1 million years ago.
d. The chemical composition of each layer can be determined by radiometric dating.
e. The oldest fossils are found near the surface, while the most recent fossils are found at deeper layers.

1 points   

QUESTION 8

  1. ​____ increases the frequency of adaptive mutations in a population over time.
a. ​Fitness
b. ​Natural selection
c. ​Artificial selection
d. ​Adaptive radiation
e. ​Macroevolution

1 points   

QUESTION 9

  1. The method that indicates the age of a substance by measuring the relative content of a radioisotope and its daughter elements is called ____ dating.​
a. fossil
b. ​radiometric
c. ​isotope
d. ​zircon
e. ​uranium

1 points   

QUESTION 10

  1. Darwin’s observation of vastly different species living in similar island environments led him to conclude that each population had arisen separately from existing species on these islands, since the geographic isolation prevented migration of species from the mainlands. This scenario is an example of ____.
a. biogeography
b. plate tectonics
c. comparative morphology
d. morphological convergence
e. homologous structures

1 points   

QUESTION 11

  1. ​When a physical barrier separates a population, leading to the evolution of new species on either side of the barrier, ____ has occurred.
a. ​sympatric speciation
b. ​allopatric speciation
c. ​directional selection
d. ​ecological isolation
e. ​behavioral isolation

1 points   

QUESTION 12

  1. The theory of continental movement is called ____.​
a. plate tectonics​
b. ​plate drift
c. ​seismology
d. ​fault line movement
e. ​sea floor spreading

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