Intro to Biology Exam Practice Questions with
Verified A+ Answers
What are the characteristics common to all living things? - Answer • All living things are made of cells
• All living things are organized and made of the
same molecules
• All living things grow, develop, and reproduce
• All living things use raw materials, produce, and use
energy
• All living things respond to the environment
• All living things maintain homeostasis
• Populations of living things evolve
what determines if something is a science? - Answer • Focuses on the natural world
• Aims to explain the natural world
• Uses testable ideas
• Relies on evidence
• Usually leads to ongoing research
• Involves the scientific community
What does science do? - Answer it aims to understand the natural
world through observation and reasoning
What are two major types of reasoning used in science? - Answer • deductive reasoning- from general
to
specific
• inductive reasoning- from specific to
general
,What are the main steps of the scientific method? - Answer - Observation
- Hypothesis
- Prediction
- Experimentation
- Conclusion
hypothesis - Answer possible explanation for an
observation
prediction - Answer what you expect if your hypothesis were true
peer review - Answer people who read an article and provide feedback
basic research - Answer is intended to extend the boundaries of what we know
applied research - Answer - Foundation provided by basic research
- May involve the manufacture of food
additives or drugs
Hypothesis vs. Theory - Answer • Hypotheses - proposed explanations for a narrow set of phenomena
• Theories - broad explanations for a wide range of
phenomena. Theories integrate and generate many
hypotheses.
What are some types of evidence that support the Theory of Evolution through Natural Selection? -
Answer
How did the atmosphere of early earth differ from now? - Answer Popular view of early atmosphere:
, • Carbon dioxide
• Nitrogen gas
• Water vapor
• Hydrogen gas
• Other sulfur, nitrogen, and carbon compound
Current atmosphere:
• Nitrogen
•Oxygen
• Argon
• Carbon dioxide
• Other trace molecules.
What did Miller-Urey experiment demonstrate? - Answer reproduce early atmosphere
Where are some current hypotheses for the source of the first biological molecules? - Answer
what are microspheres and why are they important in understanding the origin of life? - Answer they
are pre-cells.
What was the first probable genetic material? - Answer RNA
What are the first fossil signs of life on earth? - Answer • 3.7 BYA by stromatolites (BY= billion years)
• 3.0-3.1 BY fossil cells
• 1.3-1.8 BY First complex cells (with organelles)
• 700 MY Multicellularity
What are stromatolites? - Answer structures produced by
microorganisms by trapping of sediments and other particles
Verified A+ Answers
What are the characteristics common to all living things? - Answer • All living things are made of cells
• All living things are organized and made of the
same molecules
• All living things grow, develop, and reproduce
• All living things use raw materials, produce, and use
energy
• All living things respond to the environment
• All living things maintain homeostasis
• Populations of living things evolve
what determines if something is a science? - Answer • Focuses on the natural world
• Aims to explain the natural world
• Uses testable ideas
• Relies on evidence
• Usually leads to ongoing research
• Involves the scientific community
What does science do? - Answer it aims to understand the natural
world through observation and reasoning
What are two major types of reasoning used in science? - Answer • deductive reasoning- from general
to
specific
• inductive reasoning- from specific to
general
,What are the main steps of the scientific method? - Answer - Observation
- Hypothesis
- Prediction
- Experimentation
- Conclusion
hypothesis - Answer possible explanation for an
observation
prediction - Answer what you expect if your hypothesis were true
peer review - Answer people who read an article and provide feedback
basic research - Answer is intended to extend the boundaries of what we know
applied research - Answer - Foundation provided by basic research
- May involve the manufacture of food
additives or drugs
Hypothesis vs. Theory - Answer • Hypotheses - proposed explanations for a narrow set of phenomena
• Theories - broad explanations for a wide range of
phenomena. Theories integrate and generate many
hypotheses.
What are some types of evidence that support the Theory of Evolution through Natural Selection? -
Answer
How did the atmosphere of early earth differ from now? - Answer Popular view of early atmosphere:
, • Carbon dioxide
• Nitrogen gas
• Water vapor
• Hydrogen gas
• Other sulfur, nitrogen, and carbon compound
Current atmosphere:
• Nitrogen
•Oxygen
• Argon
• Carbon dioxide
• Other trace molecules.
What did Miller-Urey experiment demonstrate? - Answer reproduce early atmosphere
Where are some current hypotheses for the source of the first biological molecules? - Answer
what are microspheres and why are they important in understanding the origin of life? - Answer they
are pre-cells.
What was the first probable genetic material? - Answer RNA
What are the first fossil signs of life on earth? - Answer • 3.7 BYA by stromatolites (BY= billion years)
• 3.0-3.1 BY fossil cells
• 1.3-1.8 BY First complex cells (with organelles)
• 700 MY Multicellularity
What are stromatolites? - Answer structures produced by
microorganisms by trapping of sediments and other particles
