JMU Bio 140 Exam 1 | 186 Questions with 100% Correct Answers
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JMU Bio 140
Institution
Liberty University
What are the steps in the scientific method? - -exploration and discovery -testing ideas -community analysis and feedback -benefits and outcomes Define Theory - A well-substantiated explanation of some aspect of the natural world, based on a body of gives that have been repeatedly confirmed The ear...
jmu bio 140 exam 1 | 186 questions with 100 correct answers
what are the steps in the scientific method
the earths crust consist mainly of what elements
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JMU Bio 140
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JMU Bio 140 Exam 1 | 186 Questions with
100% Correct Answers
What are the steps in the scientific method? Correct Answer: -exploration and discovery
-testing ideas
-community analysis and feedback
-benefits and outcomes
Define Theory Correct Answer: A well-substantiated explanation of some aspect of the natural world,
based on a body of gives that have been repeatedly confirmed
The earth's crust consist mainly of what elements? Correct Answer: oxygen and silicon
The human body consist mainly of what elements? Correct Answer: oxygen, carbon, and hydrogen
Are viruses made of cells? Correct Answer: no
What is the central dogma? Correct Answer: DNA -> RNA -> Protein
When simple compounds are combined into more complex molecules, the entropy inside the cell
__________. Correct Answer: decreases
When energy is released as heat, what happens to the entropy? Correct Answer: the entropy increases
Humans and chimpanzees share _______% of our DNA. Correct Answer: 98.8
What do nodes do? Correct Answer: indicate a common ancestor
What makes a good hypothesis? Correct Answer: a prediction about observations not yet made and can
be tested by experiment or further observation
What are the characteristics of life? Correct Answer: -complexity
-ability to change in response to the environment
-ability to reproduce
-capacity to evolve
What two elements make up 99% of matter? Correct Answer: hydrogen and helium
What is the first law of thermodynamics? Correct Answer: energy can neither be created nor destroyed;
it can only be transformed from one form to another
What is the second law of thermodynamics? Correct Answer: the degree of disorder in the universe
tends to increase
The amount of disorder in a system is the ________ of the system Correct Answer: entropy
, Who completed the experiment with rotting meat? Correct Answer: Francesco Redi
What did Francesco Redi's experiment prove? Correct Answer: living things only come from other living
things
What was the hypothesis which Louis Pasture tested? Correct Answer: that microorganisms can arise by
spontaneous generation
What did Louis Pasture's experiment prove? Correct Answer: that microbes carried on airborne dust
particles is necessary for microbial growth
Define plasma membrane Correct Answer: separates the living material within the cell from the
nonliving environment around it
What is the main difference between Eukaryotes and Prokaryotes? Correct Answer: prokaryotes do not
have a nucleus
What are the two sources by which organisms acquire energy? Correct Answer: sun and chemical
compounds
Define metabolism Correct Answer: chemical reactions by which cells convert energy from one form to
another and build and breakdown molcules
Define ATP Correct Answer: stored energy in a chemical form
How does a virus spread? Correct Answer: hijacks a cell
Define natural selection Correct Answer: the process whereby organisms better adapt to their
environment tend to survive and produce more offspring
Define environmental variation Correct Answer: different environments have an effect on the organism
Define genetic variation Correct Answer: difference in genetic material that is transmitted from parents
to offspring
Define ecology Correct Answer: the study of how organisms interact with one another and with their
physical environment in nature
Elements are made up of _______ type(s) of atom(s) Correct Answer: one
Atoms are made up of what? Correct Answer: -protons
-neutrons
-electron
Atoms' nucleus is made of what? Correct Answer: protons and neutrons
What is the charge of protons? Correct Answer: positive
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