Delgado Biology 141 Test 1 Questions and Answers Solved Correctly Latest Update 2025-2026
Homeostasis - AnswersA tendency to maintain a balanced or constant internal state; the regulation of
any aspect of body chemistry, such as blood glucose, around a particular level
homologous adaptation - AnswersStructures in different species that are similar because of common
ancestry.
analogous adaptation - AnswersAdaptations that result from convergent evolution. Same function but
very different structures.
Sensitivity - Answersorganisms response to stimuli
Reproduction - Answersthe process of producing offspring
Scientific Method - AnswersA series of steps followed to solve problems including collecting data,
formulating a hypothesis, testing the hypothesis, and stating conclusions.
inductive reasoning - AnswersA type of logic in which generalizations are based on a large number of
specific observations.
deductive reasoning - Answersreasoning in which a conclusion is reached by stating a general principle
and then applying that principle to a specific case (The sun rises every morning; therefore, the sun will
rise on Tuesday morning.)
subatomic particles - Answersprotons, neutrons, electrons
Neutrons - Answersneutral charge
Electrons - Answersnegatively charged subatomic particles
Protons - AnswersPositively charged subatomic particles found in the nucleus of an atom, atomic
number
atomic weight - Answersthe number of protons plus the number of neutrons
Electronegativity - AnswersA measure of the ability of an atom in a chemical compound to attract
electrons
Ions - Answerspositively and negatively charged atoms
Isotopes - AnswersAtoms with the same number of protons but different numbers of neutrons
reduction/oxidation (redox) reaction - Answersa chemical reaction in which electrons are lost form one
substance (oxidation) and added to another (reduction)
, Cation - AnswersA positively charged ion
Anion - AnswersA negatively charged ion
ionic bond - AnswersA chemical bond resulting from the attraction between oppositely charged ions.
covalent bond - AnswersA chemical bond that involves sharing a pair of electrons between atoms in a
molecule
valance electrons - Answersthe number of electrons in the outermost energy level
octet rule - AnswersStates that atoms lose, gain or share electrons in order to acquire a full set of eight
valence electrons
hydrogen bond - AnswersA type of weak chemical bond formed when the slightly positive hydrogen
atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar
covalent bond in another molecule.
water's properties - AnswersAdhesion, cohesion, hydrophobic exclusion, high vaporization
empirical formula - Answersa chemical formula that shows the composition of a compound in terms of
the relative numbers and kinds of atoms in the simplest ratio
hydrogen bonding - Answersstrong type of intermolecular dipole-dipole attraction. Occurs between
hydrogen and F, O or N
polar - AnswersMolecule with partial charges. Mixes with water.
Monomers - Answerssmall unit that can join together with other small units to form polymers
Polymers - Answerslarge compound formed from combinations of many monomers
peptide bond - AnswersThe chemical bond that forms between the carboxyl group of one amino acid
and the amino group of another amino acid
amino acids - Answersa simple organic compound containing both a carboxyl (—COOH) and an amino
(—NH2) group.
amine group - Answersthe nitrogen-containing portion of an amino acid -NH2
R group - Answersa functional group that defines a particular amino acid and gives it special properties.
Carboxyl group - AnswersA -COOH group, found in organic acids.
Protein levels - Answers1. Primary
2. Secondary
3. Tertiary
Homeostasis - AnswersA tendency to maintain a balanced or constant internal state; the regulation of
any aspect of body chemistry, such as blood glucose, around a particular level
homologous adaptation - AnswersStructures in different species that are similar because of common
ancestry.
analogous adaptation - AnswersAdaptations that result from convergent evolution. Same function but
very different structures.
Sensitivity - Answersorganisms response to stimuli
Reproduction - Answersthe process of producing offspring
Scientific Method - AnswersA series of steps followed to solve problems including collecting data,
formulating a hypothesis, testing the hypothesis, and stating conclusions.
inductive reasoning - AnswersA type of logic in which generalizations are based on a large number of
specific observations.
deductive reasoning - Answersreasoning in which a conclusion is reached by stating a general principle
and then applying that principle to a specific case (The sun rises every morning; therefore, the sun will
rise on Tuesday morning.)
subatomic particles - Answersprotons, neutrons, electrons
Neutrons - Answersneutral charge
Electrons - Answersnegatively charged subatomic particles
Protons - AnswersPositively charged subatomic particles found in the nucleus of an atom, atomic
number
atomic weight - Answersthe number of protons plus the number of neutrons
Electronegativity - AnswersA measure of the ability of an atom in a chemical compound to attract
electrons
Ions - Answerspositively and negatively charged atoms
Isotopes - AnswersAtoms with the same number of protons but different numbers of neutrons
reduction/oxidation (redox) reaction - Answersa chemical reaction in which electrons are lost form one
substance (oxidation) and added to another (reduction)
, Cation - AnswersA positively charged ion
Anion - AnswersA negatively charged ion
ionic bond - AnswersA chemical bond resulting from the attraction between oppositely charged ions.
covalent bond - AnswersA chemical bond that involves sharing a pair of electrons between atoms in a
molecule
valance electrons - Answersthe number of electrons in the outermost energy level
octet rule - AnswersStates that atoms lose, gain or share electrons in order to acquire a full set of eight
valence electrons
hydrogen bond - AnswersA type of weak chemical bond formed when the slightly positive hydrogen
atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar
covalent bond in another molecule.
water's properties - AnswersAdhesion, cohesion, hydrophobic exclusion, high vaporization
empirical formula - Answersa chemical formula that shows the composition of a compound in terms of
the relative numbers and kinds of atoms in the simplest ratio
hydrogen bonding - Answersstrong type of intermolecular dipole-dipole attraction. Occurs between
hydrogen and F, O or N
polar - AnswersMolecule with partial charges. Mixes with water.
Monomers - Answerssmall unit that can join together with other small units to form polymers
Polymers - Answerslarge compound formed from combinations of many monomers
peptide bond - AnswersThe chemical bond that forms between the carboxyl group of one amino acid
and the amino group of another amino acid
amino acids - Answersa simple organic compound containing both a carboxyl (—COOH) and an amino
(—NH2) group.
amine group - Answersthe nitrogen-containing portion of an amino acid -NH2
R group - Answersa functional group that defines a particular amino acid and gives it special properties.
Carboxyl group - AnswersA -COOH group, found in organic acids.
Protein levels - Answers1. Primary
2. Secondary
3. Tertiary
