Biology 103 Exam 1 Study Guide
(Chapters 1-3) Questions And Answers
/. smallest unit of matter - Answer-✅atoms
/.(2+) atoms chemically bonded together - Answer-✅molecules
/.smallest unit of life - Answer-✅cell
/.What are the general characteristics of living things? - Answer-✅grow & reproduce;
use & produce energy
/.What are 5 general characteristics of living things? - Answer-✅growth & reproduction,
organization, respond, DNA, energy
/.ability to do work - Answer-✅energy
/.substances necessary for health - Answer-✅nutrients
/.organisms that use energy in sun to make chemical energy; make their own food -
Answer-✅producers
/.organisms that can't make their own food - Answer-✅consumers
/.internal & external sensors that allow the body to maintain stability - Answer-
✅Receptors and Homeostasis
/.A group of species that share unique features. 1st letter is capitalized. - Answer-
✅Genus
/.Individuals that share one or more heritable traits that can interbreed (all lowercase); if
typed-italicized; if handwritten, underline separately - Answer-✅species
/.Three domains of organisms - Answer-✅archae, bacteria, eukarya
/.no nucleus (DNA is not membrane-bound); smaller, less complex cells; includes
Archae, Bacteria - Answer-✅Prokaryotes
/.nucleus (DNA s membrane-bound); larger, more complex cells; includes protists,
plants, fungi, animals - Answer-✅Eukaryotes
, /.What is the scientific method approach? - Answer-✅OHEAR = observation,
hypothesis, experiment, assess results, report
/.has independent variable - Answer-✅Experimental group
/.lacks variable, used for comparison - Answer-✅control group
/.What is the importance of using large sample groups to avoid sampling error? -
Answer-✅large sample group shows trend
/.(-)found in electron shells outside nucleus; determines atom's reactivity - Answer-
✅electrons
/.(+) found in nucleus - Answer-✅protons
/.(neutral) found in nucleus - Answer-✅neutrons
/.all one kind of atom - Answer-✅elements
/.atoms with differing neutron numbers - Answer-✅isotopes
/.number of protons; determines atom's identity - Answer-✅atomic number
/.mass of nucleus (protons & neutrons) - Answer-✅mass number
/.nucleus (protons & neutrons); electron shells (2,8,...) - Answer-✅general structure of
an atom
/.a measure of an atom's ability to pull electrons from another atom - Answer-
✅electronegativity
/.atoms that gain (-ion) or lose (+ion) electrons - Answer-✅ions
/.when electron hold atoms together forming molecules - Answer-✅chemical bond
/.bond formed between 2 oppositely charged atoms - Answer-✅ionic bonding
/.bonds formed when atoms share electrons - Answer-✅covalent bonding
/.equally - Answer-✅nonpolar bonding
/.unequally - Answer-✅polar bonding
(Chapters 1-3) Questions And Answers
/. smallest unit of matter - Answer-✅atoms
/.(2+) atoms chemically bonded together - Answer-✅molecules
/.smallest unit of life - Answer-✅cell
/.What are the general characteristics of living things? - Answer-✅grow & reproduce;
use & produce energy
/.What are 5 general characteristics of living things? - Answer-✅growth & reproduction,
organization, respond, DNA, energy
/.ability to do work - Answer-✅energy
/.substances necessary for health - Answer-✅nutrients
/.organisms that use energy in sun to make chemical energy; make their own food -
Answer-✅producers
/.organisms that can't make their own food - Answer-✅consumers
/.internal & external sensors that allow the body to maintain stability - Answer-
✅Receptors and Homeostasis
/.A group of species that share unique features. 1st letter is capitalized. - Answer-
✅Genus
/.Individuals that share one or more heritable traits that can interbreed (all lowercase); if
typed-italicized; if handwritten, underline separately - Answer-✅species
/.Three domains of organisms - Answer-✅archae, bacteria, eukarya
/.no nucleus (DNA is not membrane-bound); smaller, less complex cells; includes
Archae, Bacteria - Answer-✅Prokaryotes
/.nucleus (DNA s membrane-bound); larger, more complex cells; includes protists,
plants, fungi, animals - Answer-✅Eukaryotes
, /.What is the scientific method approach? - Answer-✅OHEAR = observation,
hypothesis, experiment, assess results, report
/.has independent variable - Answer-✅Experimental group
/.lacks variable, used for comparison - Answer-✅control group
/.What is the importance of using large sample groups to avoid sampling error? -
Answer-✅large sample group shows trend
/.(-)found in electron shells outside nucleus; determines atom's reactivity - Answer-
✅electrons
/.(+) found in nucleus - Answer-✅protons
/.(neutral) found in nucleus - Answer-✅neutrons
/.all one kind of atom - Answer-✅elements
/.atoms with differing neutron numbers - Answer-✅isotopes
/.number of protons; determines atom's identity - Answer-✅atomic number
/.mass of nucleus (protons & neutrons) - Answer-✅mass number
/.nucleus (protons & neutrons); electron shells (2,8,...) - Answer-✅general structure of
an atom
/.a measure of an atom's ability to pull electrons from another atom - Answer-
✅electronegativity
/.atoms that gain (-ion) or lose (+ion) electrons - Answer-✅ions
/.when electron hold atoms together forming molecules - Answer-✅chemical bond
/.bond formed between 2 oppositely charged atoms - Answer-✅ionic bonding
/.bonds formed when atoms share electrons - Answer-✅covalent bonding
/.equally - Answer-✅nonpolar bonding
/.unequally - Answer-✅polar bonding
