Life Science Chapter 8 Question Preview (ID: 23905)
History Of Life On Earth.
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How old do scientist estimate the age of the Earth to be?
a) 14.8 Billion Years
b) 4.6 Billion Years
c) 400 Million Years
d) 10,000 Years
The Age of Reptiles refers to the ______________.
a) Cenozoic Era
b) Mesozoic Era
c) Archaen Eon
d) Paleozoic Era
Most ancient hominids are called ____________.
a) Neanderthals
b) Cro-magnons
c) australopithecines
d) prosimians
The Age of Mammals refers to the _______________.
a) Cenozoic Era
b) Paleozoic Era
c) Precambrian Time
d) Hadeon Eon
Plants and air-breathing animals appeared during this time period.
a) Precambrian time
b) Mesozoic Era
c) Paleozoic Era
d) Cenozoic Era
Which occurred first in hominid evolution, an enlarged brain or the ability to walk upright?
a) ability to walk upright
b) enlarged brain
c) neither of these occurred in hominid evolution
d) they occurred at the same time
The first organisms to appear on Earth were
a) aerobic
b) anaerobic
c) eukaryotes
d) multi-cellular
Past mass extinctions most likely occured as a result of ________.
a) predator-prey changes
b) global climate change
c) oxygen pollution
d) ozone depletion
Which group of hominids that lived in Europe and Asia disappeared form the fossil record about 30,000 years ago?
a) homo erectus
b) Neanderthals
c) australopithecines
d) homo sapiens
Which of the following is characteristic of ALL primates?
a) bipedalism
b) monocular vision
c) horizontal pelvis
d) opposable thumbs
Cyanobacteria, which first appeared on Earth over 3 billion years ago, are
a) prokaryotes
b) eukaryotes
c) terrestrial organisms
d) dinosaurs
Which of the following is characteristic of ALL primates?
a) binocular vision
b) bipedalism
c) vertical pelvis
d) opposable big toes
Although _____________ had thicker and heavier bones than present-day humans, they appear to be our closest ancestors.
a) Neanderthals
b) homo erectus
c) homo habilis
d) Cro-magnons
The first primate ancestors, called ___________, appeared during the Cenozoic era.
a) homo sapiens
b) prosimians
c) homo erectus
d) australopithecines
Some important divisions of geologic time are marked by______________.
a) Mass Speciations
b) A certain number of years
c) Mass Extinctions
d) The type of homInid alive
Dinosaurs dominated the Earth during the _______________, some 200 million years ago.
a) Mesozoic Era
b) Cenozoic Era
c) Paleozoic Era
d) Precambrian Time
Paleontologist use _______________ to estimate the age of a fossil based on the layer in which it is found.
a) Carbon-14 Dating
b) Radiometric Dating
c) Absolute Dating
d) Relative Dating
An ape is a hominid.
a) True
b) False
c)
d)
Traces or imprints of living things preserved in rock are called __________.
a) sedimentary rock
b) fossils
c) frozen fossils
d) skeletons
The amount of time it takes for half of the unstable atoms in an element to decay is called the _________.
a) radiometric life
b) half-life
c) absolute age
d) relative age
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