BIOLOGY 121 - UNIT 1 EXAM WITH
CORRECT ANSWERS 2024
Scientific Method - correct answers-1. Make observation
2. Ask questions
3. Formulate a hypothesis
4. Design experiment
5. Analyze the results
6. Develop a theory
Hypothesis - correct answers-a tentative explanation of a process in an experimental or
observational study
Logical and testable
Theory - correct answers-a verified hypothesis
Prediction - correct answers-expected outcome of an experimental or observational
study if the hypothesis is true
7 properties of life - correct answers-1. Contain cells
2. Reproduce
3. Grow and develop
4. Metabolism
5. Homeostasis
6. Respond to stimuli
7. Adaptive to environments
Inheritance - correct answers-passing on genes to offspring
Adaptation - correct answers-any inherited trait that enhances an individual's ability to
survive/reproduce in an environment
Evolution - correct answers-genetic change in a population over time
Levels of organization in nature - correct answers-1. Atom
2. Molecule
3. Organelle
4. Cell (smallest unit of life)
, 5. Tissue
6. Organ
7. Organ system
8. Multicelled organism
9. Population
10. Community
11. Ecosystem
12. Biosphere
Isotope - correct answers-elements that differ in the # of neutrons
Covalent Bond - correct answers-formed by the sharing of electrons
Nonpolar Covalent Bond - correct answers-electrons shared EQUALLY
Polar Covalent Bond - correct answers-electrons shared UNEQUALLY
Ionic Bond - correct answers-opposite charges attract
"The Big Four" - correct answers-Oxygen (O)
Carbon (C)
Hydrogen (H)
Nitrogen (N)
"Elemental Form" of an atom - correct answers-has no electrical charge
# of protons = # of electrons
Octet Rule - correct answers-atoms tend to react with other atoms so that both fill their
outermost shells to capacity
Water: significance for life - correct answers-Due to its polarity, water is an excellent
solvent
Facilitates biochemical reactions
Cells are mostly water
Acid - correct answers-compound that dissociates in water and releases HYDROGEN
ions
Base - correct answers-compound that dissociates in water and releases HYDROXIDE
ions
CORRECT ANSWERS 2024
Scientific Method - correct answers-1. Make observation
2. Ask questions
3. Formulate a hypothesis
4. Design experiment
5. Analyze the results
6. Develop a theory
Hypothesis - correct answers-a tentative explanation of a process in an experimental or
observational study
Logical and testable
Theory - correct answers-a verified hypothesis
Prediction - correct answers-expected outcome of an experimental or observational
study if the hypothesis is true
7 properties of life - correct answers-1. Contain cells
2. Reproduce
3. Grow and develop
4. Metabolism
5. Homeostasis
6. Respond to stimuli
7. Adaptive to environments
Inheritance - correct answers-passing on genes to offspring
Adaptation - correct answers-any inherited trait that enhances an individual's ability to
survive/reproduce in an environment
Evolution - correct answers-genetic change in a population over time
Levels of organization in nature - correct answers-1. Atom
2. Molecule
3. Organelle
4. Cell (smallest unit of life)
, 5. Tissue
6. Organ
7. Organ system
8. Multicelled organism
9. Population
10. Community
11. Ecosystem
12. Biosphere
Isotope - correct answers-elements that differ in the # of neutrons
Covalent Bond - correct answers-formed by the sharing of electrons
Nonpolar Covalent Bond - correct answers-electrons shared EQUALLY
Polar Covalent Bond - correct answers-electrons shared UNEQUALLY
Ionic Bond - correct answers-opposite charges attract
"The Big Four" - correct answers-Oxygen (O)
Carbon (C)
Hydrogen (H)
Nitrogen (N)
"Elemental Form" of an atom - correct answers-has no electrical charge
# of protons = # of electrons
Octet Rule - correct answers-atoms tend to react with other atoms so that both fill their
outermost shells to capacity
Water: significance for life - correct answers-Due to its polarity, water is an excellent
solvent
Facilitates biochemical reactions
Cells are mostly water
Acid - correct answers-compound that dissociates in water and releases HYDROGEN
ions
Base - correct answers-compound that dissociates in water and releases HYDROXIDE
ions
