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BIOL 1406 Exam 1 Questions with Detailed
Verified Answers
Order of biological organization Ans: Tissue → Organ → Organ System
→ Organism → Population → Community → Ecosystem → Biosphere
7 properties of life Ans: Order, response to stimuli, reproduction,
adaptation, growth & development, regulation, energy processing
Homeostasis Ans: Maintaining stable internal conditions despite outside
changes
Steps of the scientific method Ans: Observation → Question →
Hypothesis → Prediction → Experiment → Results → Conclusion
Hypothesis Ans: A testable explanation for an observation
Scientific theory Ans: A broad explanation supported by lots of evidence
Independent variable Ans: The factor that is changed in an experiment
Dependent variable Ans: The factor that is measured in an experiment
Constants in an experiment Ans: Conditions kept the same for all
groups
Null hypothesis Ans: States there is no effect or difference
Alternative hypothesis Ans: States there is an effect or difference
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Difference between prokaryotic and eukaryotic cells Ans: Prokaryotic =
no nucleus, no membrane-bound organelles; Eukaryotic = nucleus +
organelles
Atom Ans: Smallest unit of matter that retains element's properties
3 subatomic particles Ans: Proton (+), Neutron (0), Electron (-)
Electrons location Ans: In energy shells around the nucleus
Atom's chemical behavior Ans: Number of electrons in outer shell
(valence electrons)
Isotope Ans: Atoms of the same element with different numbers of
neutrons
Isomer Ans: Molecules with same formula but different structure
Carbon dating Ans: Using radioactive decay of carbon isotopes to
estimate age of fossils
4 types of bonds Ans: Covalent, ionic, hydrogen, van der Waals
Covalent bond Ans: Sharing of electrons between atoms
Polar covalent bond Ans: Unequal sharing of electrons (creates partial
charges)
Nonpolar covalent bond Ans: Equal sharing of electrons (no charges)
Ionic bond Ans: Transfer of electrons → creates charged ions (Na⁺, Cl⁻)
Hydrogen bond Ans: Weak attraction between H (partial +) and O or N
(partial -)
Van der Waals interaction Ans: Weak attraction between nearby
molecules due to temporary charges
BIOL 1406 Exam 1 Questions with Detailed
Verified Answers
Order of biological organization Ans: Tissue → Organ → Organ System
→ Organism → Population → Community → Ecosystem → Biosphere
7 properties of life Ans: Order, response to stimuli, reproduction,
adaptation, growth & development, regulation, energy processing
Homeostasis Ans: Maintaining stable internal conditions despite outside
changes
Steps of the scientific method Ans: Observation → Question →
Hypothesis → Prediction → Experiment → Results → Conclusion
Hypothesis Ans: A testable explanation for an observation
Scientific theory Ans: A broad explanation supported by lots of evidence
Independent variable Ans: The factor that is changed in an experiment
Dependent variable Ans: The factor that is measured in an experiment
Constants in an experiment Ans: Conditions kept the same for all
groups
Null hypothesis Ans: States there is no effect or difference
Alternative hypothesis Ans: States there is an effect or difference
, Page | 2
Difference between prokaryotic and eukaryotic cells Ans: Prokaryotic =
no nucleus, no membrane-bound organelles; Eukaryotic = nucleus +
organelles
Atom Ans: Smallest unit of matter that retains element's properties
3 subatomic particles Ans: Proton (+), Neutron (0), Electron (-)
Electrons location Ans: In energy shells around the nucleus
Atom's chemical behavior Ans: Number of electrons in outer shell
(valence electrons)
Isotope Ans: Atoms of the same element with different numbers of
neutrons
Isomer Ans: Molecules with same formula but different structure
Carbon dating Ans: Using radioactive decay of carbon isotopes to
estimate age of fossils
4 types of bonds Ans: Covalent, ionic, hydrogen, van der Waals
Covalent bond Ans: Sharing of electrons between atoms
Polar covalent bond Ans: Unequal sharing of electrons (creates partial
charges)
Nonpolar covalent bond Ans: Equal sharing of electrons (no charges)
Ionic bond Ans: Transfer of electrons → creates charged ions (Na⁺, Cl⁻)
Hydrogen bond Ans: Weak attraction between H (partial +) and O or N
(partial -)
Van der Waals interaction Ans: Weak attraction between nearby
molecules due to temporary charges
