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Biology 101 Exam 1 Questions and Answers
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Biology 101 Exam 1 Questions and Answers
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Biology 101 Exam 1 Questions andAnswers
Biology - Answer-The scientific study of life
Ecosystem - Answer-All the organisms living in a particular area
Community - Answer-Entire array of organisms in a ecosystem
Population - Answer-All individuals of a particular species living in an area
Organism - Answer-individual living thing
Organ system - Answer-several organs that cooperate in a specific function
Organ - Answer-Made up of several different tissues made up of a group of similar cells
that perform a specific function
Cell - Answer-Fundamental unit of life
Organelle - Answer-Membrane enclosed structure that performs a specific function
within the cell
Molecule - Answer-Cluster of small chemical units called atoms held together by
chemical bonds
Prokaryotic Cells - Answer-Small
Simple
unicellular
No organelle system
No nucleus
cell walls made of sugar
Eukaryotic Cells - Answer-Large
complex
unicellular & multicellular
have nucleus
may have cell walls
Producers - Answer-Organisms in eco- system that can make their own food
Consumers - Answer-Eat plants and other animals
, Decomposers - Answer-Take matter and breaks down protein and distributes it back
into Earth
Four most common elements in living organisms - Answer-Oxygen(O)
Hydrogen(H)
Nitrogen(N)
Carbon(C)
Atoms - Answer-Smallest units of matter
Matter - Answer-Anything that occupies space and has mass
Element - Answer-A substance that cannot be broken down to other substances by
ordinary chemical means
Compound - Answer-Substance consisting of two or more different elements combined
in a fixed ratio
Percentage of elements used by organisms - Answer-96.3%
Percentage of trace elements of human body weight - Answer-0.01%
Proton - Answer-Subatomic particle with a single positive electrical charge (+)
Electron - Answer-Subatomic particle with a single negative charge (-)
Neutron - Answer-Is electrically neutral (no charge)
Atomic number - Answer-Atoms of a particular element have the same number of
protons
Covalent Bonds - Answer-Strongest bonds; Electrons are shared between two atoms
Electronegativity - Answer-An atom's attraction for shared electrons
Nonpolar covalent bonds - Answer-Molecules of one element, two identical atoms exert
an equal pull on electrons
Polar covalent bonds - Answer-unequal sharing of electrons
Ionic bonds - Answer-Electrons transferred from one atom to another
Hydrogen bonds - Answer-Two polar covalent being attracted to other polar covalent
bonds
Water - Answer-polar covalent molecule
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