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JMU Bio 140 Exam 1 Questions And 100%
Correct Answers Top Rated
The earth's crust consists mainly of what elements?
oxygen and silicon
The human body consist mainly of what elements?
oxygen, carbon, and hydrogen
Are viruses made of cells?
no
What is the central dogma?
DNA -> RNA -> Protein
When simple compounds are combined into more complex molecules,
the entropy inside the cell __________.
decreases
When energy is released as heat, what happens to the entropy?
the entropy increases
Humans and chimpanzees share _______% of our DNA.
98.8
What do nodes do?
indicate a common ancestor
What makes a good hypothesis?
,!@#$%^&*&^%$#@#$%^&*(*&^%$#@$%^&*&^
a prediction about observations
not yet made and can be tested by
experiment or further observation
What are the characteristics of life?
-complexity
-ability to change in response to the environment
-ability to reproduce
-capacity to evolve
What two elements make up 99% of matter?
hydrogen and helium
What is the first law of thermodynamics?
energy can neither be created nor destroyed; it can only be
transformed from one form to another
What is the second law of thermodynamics?
the degree of disorder in the universe tends to increase
The amount of disorder in a system is the ________ of the system
entropy
Who completed the experiment with rotting meat?
Francesco Redi
What did Francesco Redi's experiment prove?
living things only come from other living things
What was the hypothesis which Louis Pasture tested?
that microorganisms can arise by spontaneous generation
What did Louis Pasture's experiment prove?
, !@#$%^&*&^%$#@#$%^&*(*&^%$#@$%^&*&^
that microbes carried on airborne dust particles is necessary for
microbial growth
Define plasma membrane
separates the living material within the cell from the nonliving
environment around it
What is the main difference between Eukaryotes and Prokaryotes?
prokaryotes do not have a nucleus
What are the two sources by which organisms acquire energy?
sun and chemical compounds
Define metabolism
chemical reactions by which cells convert energy from one form to
another and build and breakdown molcules
Define ATP
stored energy in a chemical form
How does a virus spread?
hijacks a cell
Define natural selection
the process whereby organisms better adapt to their environment tend
to survive and produce more offspring
Define environmental variation
different environments have an effect on the organism
Define genetic variation
JMU Bio 140 Exam 1 Questions And 100%
Correct Answers Top Rated
The earth's crust consists mainly of what elements?
oxygen and silicon
The human body consist mainly of what elements?
oxygen, carbon, and hydrogen
Are viruses made of cells?
no
What is the central dogma?
DNA -> RNA -> Protein
When simple compounds are combined into more complex molecules,
the entropy inside the cell __________.
decreases
When energy is released as heat, what happens to the entropy?
the entropy increases
Humans and chimpanzees share _______% of our DNA.
98.8
What do nodes do?
indicate a common ancestor
What makes a good hypothesis?
,!@#$%^&*&^%$#@#$%^&*(*&^%$#@$%^&*&^
a prediction about observations
not yet made and can be tested by
experiment or further observation
What are the characteristics of life?
-complexity
-ability to change in response to the environment
-ability to reproduce
-capacity to evolve
What two elements make up 99% of matter?
hydrogen and helium
What is the first law of thermodynamics?
energy can neither be created nor destroyed; it can only be
transformed from one form to another
What is the second law of thermodynamics?
the degree of disorder in the universe tends to increase
The amount of disorder in a system is the ________ of the system
entropy
Who completed the experiment with rotting meat?
Francesco Redi
What did Francesco Redi's experiment prove?
living things only come from other living things
What was the hypothesis which Louis Pasture tested?
that microorganisms can arise by spontaneous generation
What did Louis Pasture's experiment prove?
, !@#$%^&*&^%$#@#$%^&*(*&^%$#@$%^&*&^
that microbes carried on airborne dust particles is necessary for
microbial growth
Define plasma membrane
separates the living material within the cell from the nonliving
environment around it
What is the main difference between Eukaryotes and Prokaryotes?
prokaryotes do not have a nucleus
What are the two sources by which organisms acquire energy?
sun and chemical compounds
Define metabolism
chemical reactions by which cells convert energy from one form to
another and build and breakdown molcules
Define ATP
stored energy in a chemical form
How does a virus spread?
hijacks a cell
Define natural selection
the process whereby organisms better adapt to their environment tend
to survive and produce more offspring
Define environmental variation
different environments have an effect on the organism
Define genetic variation
