Biology 1407 test exam quiz and
answers graded A+
How was early earth from more than 3 billion years ago different from today's birth? Unlike earth
today, early earth _____________. - ANS✅✅Had an atmosphere rich and gases released from
volcanic eruptions
Which of the following is a defining characteristic that all protocells had in common? - ANS✅✅A
surrounding membrane or membrane like structure
The first genetic material on Earth was probably _____. - ANS✅✅self-replicating RNA molecules
What is the most accurate method used to measure the age of a fossil? - ANS✅✅radiometric
dating
What concepts explains the evolution of complex eyes? - ANS✅✅Complex eyes evolved through a
series of steps that benefited the eyes
This bacterium's ability to survive in a human who is taking penicillin pills may be due to the
presence of __________. - ANS✅✅Gram-negative cell wall
Adherence to the intestinal lining by this bacterium is due to its possession of __________. -
ANS✅✅Fimbriae
Biologists sometimes divide living organisms into two groups: autotrophs and heterotrophs. These
two groups differ in _____. - ANS✅✅their sources of carbon
You have found a new prokaryote. What line of evidence would support your hypothesis that the
organism is a cyanobacterium? - ANS✅✅It is able to form colonies and produce oxygen.
Which of the following traits do archaeans and bacteria share? - ANS✅✅lack of a nuclear envelope
and presence of circular chromosome
, Which of the following steps has NOT yet been accomplished by scientist studying the origin of life? -
ANS✅✅Formation of Proto cells that use DNA to direct the polymerization of amino acids
Why do some scientist believe that RNA, rather than DNA , Was the first genetic material? -
ANS✅✅RNA has both information storage and catalytic properties
Miller and Urey Experiments that attempted to recreate conditions on early earth were significant
because? - ANS✅✅They showed that organic molecules such as amino acids could be produced
from inorganic molecules
Earth probably formed _____ years ago, and the first life evolved as early as _____ years ago. -
ANS✅✅4.5 billion years ago ... 3.9 billion years ago
The oldest fossils usually _____. - ANS✅✅are found in the deepest strata
radiometric dating __________. - ANS✅✅allows us to indirectly date fossils up to billions of years
old based on minerals in surrounding volcanic strata
The earliest organisms were most likely _____. - ANS✅✅Prokaryotic
The atmosphere of early Earth probably contained no O2 until the emergence of organisms that
_____. - ANS✅✅used water as an electron source for photosynthesis
How does continental drift affect living organisms? - ANS✅✅It causes climate change which puts
selective pressure on organisms , it causes changes in habitats, such as when large amounts of
shallow marine habitat were lost in the formation of Pangaea, it may cause an increase or decrease
in competition among different species, it happens so slowly that it does not affect living organisms.
Hoax genes are thought play an important role in the development of different morphologies
because __________. - ANS✅✅They provide postitutional information in the embryo
Evolution works by _____. - ANS✅✅"tinkering" with existing structures
Which of the following would be the least likely to appear in the fossil record? - ANS✅✅desert-
dwelling species
answers graded A+
How was early earth from more than 3 billion years ago different from today's birth? Unlike earth
today, early earth _____________. - ANS✅✅Had an atmosphere rich and gases released from
volcanic eruptions
Which of the following is a defining characteristic that all protocells had in common? - ANS✅✅A
surrounding membrane or membrane like structure
The first genetic material on Earth was probably _____. - ANS✅✅self-replicating RNA molecules
What is the most accurate method used to measure the age of a fossil? - ANS✅✅radiometric
dating
What concepts explains the evolution of complex eyes? - ANS✅✅Complex eyes evolved through a
series of steps that benefited the eyes
This bacterium's ability to survive in a human who is taking penicillin pills may be due to the
presence of __________. - ANS✅✅Gram-negative cell wall
Adherence to the intestinal lining by this bacterium is due to its possession of __________. -
ANS✅✅Fimbriae
Biologists sometimes divide living organisms into two groups: autotrophs and heterotrophs. These
two groups differ in _____. - ANS✅✅their sources of carbon
You have found a new prokaryote. What line of evidence would support your hypothesis that the
organism is a cyanobacterium? - ANS✅✅It is able to form colonies and produce oxygen.
Which of the following traits do archaeans and bacteria share? - ANS✅✅lack of a nuclear envelope
and presence of circular chromosome
, Which of the following steps has NOT yet been accomplished by scientist studying the origin of life? -
ANS✅✅Formation of Proto cells that use DNA to direct the polymerization of amino acids
Why do some scientist believe that RNA, rather than DNA , Was the first genetic material? -
ANS✅✅RNA has both information storage and catalytic properties
Miller and Urey Experiments that attempted to recreate conditions on early earth were significant
because? - ANS✅✅They showed that organic molecules such as amino acids could be produced
from inorganic molecules
Earth probably formed _____ years ago, and the first life evolved as early as _____ years ago. -
ANS✅✅4.5 billion years ago ... 3.9 billion years ago
The oldest fossils usually _____. - ANS✅✅are found in the deepest strata
radiometric dating __________. - ANS✅✅allows us to indirectly date fossils up to billions of years
old based on minerals in surrounding volcanic strata
The earliest organisms were most likely _____. - ANS✅✅Prokaryotic
The atmosphere of early Earth probably contained no O2 until the emergence of organisms that
_____. - ANS✅✅used water as an electron source for photosynthesis
How does continental drift affect living organisms? - ANS✅✅It causes climate change which puts
selective pressure on organisms , it causes changes in habitats, such as when large amounts of
shallow marine habitat were lost in the formation of Pangaea, it may cause an increase or decrease
in competition among different species, it happens so slowly that it does not affect living organisms.
Hoax genes are thought play an important role in the development of different morphologies
because __________. - ANS✅✅They provide postitutional information in the embryo
Evolution works by _____. - ANS✅✅"tinkering" with existing structures
Which of the following would be the least likely to appear in the fossil record? - ANS✅✅desert-
dwelling species
