Which of the following is the smallest unit of organization that can perform all activities required for life? - ANSWERScell
With evolution as the core theme of biology, we can explain traits shared by organisms as evidence of __________ and traits that differ among organisms as evidence of ____...
BIO 1305 Final Baylor Questions &
Answers
Which of the following is the smallest unit of organization that can perform all activities
required for life? - ANSWERScell
With evolution as the core theme of biology, we can explain traits shared by organisms
as evidence of __________ and traits that differ among organisms as evidence of
__________. - ANSWERSdescent from a common ancestor; adaptation through natural
selection
Which series of terms is in the correct sequence of biological organization, from the
simplest to the most complex? - ANSWERScell, tissue, organ, population, community
Regulation of molecules within an organism in response to a changing level of
chemicals and the ability to self-regulate is called __________. - ANSWERSfeedback
regulation
Which of the following is an attribute of living things? - ANSWERSthey must be able to
evolve and adapt
The fundamental organizing principle of biology and core theme is __________. -
ANSWERSevolution
The process that directs the manufacture of a cell product from a gene is called
__________. - ANSWERSgene expression
the best method for determining whether bean plants require sodium is to _______ -
ANSWERSgrow bean plants with and without sodium
The energy used by most organisms for metabolism and growth ultimately comes from
__________. - ANSWERSthe sun
Natural selection tends to act at which of the following levels? - ANSWERSpopulation
The units of inheritance are called __________. - ANSWERSgenes
What is the appropriate term for an interacting group of individuals of a single type
occupying a defined area? - ANSWERSpopulation
How is the information encoded in DNA actually used by organisms? - ANSWERSthe
information in DNA is transcribed to RNA and then translated into protein
,Using models that represented camouflaged and non-camouflaged mice, Hoekstra and
her students tested the hypothesis that coloration of beach and inland mice provides
camouflage that protects them from predation.
Regardless of whether the models were placed in the beach or the inland habitat, the
camouflaged model always acted as the __________ group. - ANSWERScontrol
Which of the following statements best describes what is meant by "emergence"? -
ANSWERSthe whole is greater than the sum of the parts
A hypothesis must be testable and falsifiable to be scientifically valid. Being testable
and falsifiable means that __________. - ANSWERSsome conceivable observation or
experiment could reveal whether a given hypothesis is incorrect
The information in a gene that directs the production of a cellular product is gene
expression. The correct sequence for the transfer of information from a gene to a
function protein is __________. - ANSWERStranscription, translation, and protein
folding
The two main forms of cells are __________ cells. - ANSWERSProkaryotic and
Eukaryotic
Which of the following statements is most clearly inductively derived? - ANSWERSIf the
animals observed require organic molecules as nutrients, then it can be concluded that
all animals require organic molecules as nutrients.
Which of the following observations and inferences led Charles Darwin to his theory of
natural selection as a mechanism for evolution? - ANSWERSDarwin synthesized his
theory of natural selection from all of the listed observations and inferences.
Feedback regulation includes __________. - ANSWERSboth negative feedback where
the pathway shuts down and positive feedback where the pathway speeds up
a scientific theory is - ANSWERSa well-supported concept that has broad explanatory
power
the genetic material within cells is called ________ and is organized into structures
called _______ - ANSWERSDNA ; chromosomes
A nonlinear, realistic model of the scientific process is called the process of science.
The core activity of this process is __________. - ANSWERSforming and testing
hypotheses
What is the molecule that can account for both the unity and the diversity of life? -
ANSWERSDNA
,In the theme of biological organization, the approach called reductionism __________. -
ANSWERSallows us to reduce complex systems to simpler components that are more
manageable to study
Some properties and processes that are associated with life include all of the following
except _____________. - ANSWERSreductionism
The concept of "descent with modification" was proposed by __________. -
ANSWERScharles darwin
The use of energy and matter by living organisms __________. - ANSWERSinvolves
chemical cycling from light energy from the sun for the production of chemical energy in
food to the decomposition and the returning of chemicals to the cycle
The three-domains of life ________ - ANSWERSare bacteria, archaea, and eukarya
Weak chemical bonds such as hydrogen bonds __________. - ANSWERSform when a
hydrogen atom that is covalently bonded to an electronegative atom like oxygen or
nitrogen is attracted to another electronegative atom
A covalent bond __________. - ANSWERSis the sharing of a pair of valence electrons
by two atoms
The reactivity of an atom arises from __________. - ANSWERSthe existence of
unpaired electrons in the valence shell
In a process called radiometric dating, scientists measure the __________ of an isotope
to determine the age of the Earth. - ANSWERShalf-life
Hydrogen bonds occur when __________. - ANSWERSpartial opposite charges on
molecules come close enough to attract each other
Which of the following has negligible mass? - ANSWERSelectron
In chemical reactions, the __________ are the starting materials that are converted into
the __________. - ANSWERSreactants; products
When the proton number and electron number are unequal, the atom or molecule
__________. - ANSWERSis an ion
Which of the following statements is true about chemical reactions? - ANSWERSThey
involve the making and breaking of chemical bonds.
A covalent bond is likely to be polar if __________. - ANSWERSone of the atoms
sharing electrons is much more electronegative
, Which statement is true of all atoms that are anions? - ANSWERSThe atom has more
electrons than protons.
The number of protons in an uncharged atom __________. - ANSWERSequals the
number of electrons
Trace elements _________ - ANSWERSare required by an organism in only minute
quantities
isotopes of an element will always differ in _______ - ANSWERSatomic mass
radioactive tracers _________ - ANSWERSare important tools in biological research
and medicine
what are the four most abundant elements found in living systems -
ANSWERShydrogen, oxygen, nitrogen, and carbon
Nonpolar covalent bonds are always formed from atoms that are __________. -
ANSWERSequal in their electronegativity
The difference between a stable isotope and an unstable isotope of an element is that
__________. - ANSWERSthe unstable isotope has a nucleus that decays
spontaneously, is radioactive, and can be transformed into an atom of another element
Which of the following four statements, if any, is true regarding essential elements and
living organisms? - ANSWERSAlthough all forms of life require iron, other elements are
required only by certain species.
In ionic interactions, __________ - ANSWERSthe transfer of valence electrons results
in a completed valence shell for each ion
The fact that oxygen is an atom that is strongly electronegative means that
__________. - ANSWERSit more strongly pulls shared electrons toward itself when
forming a covalent bond with a less electronegative atom
Molecular mimics _______ - ANSWERScan produce similar effects as the naturally
occurring molecules
When one or more pairs of valence electrons are shared by two neutral atoms, what
type of bond is formed? - ANSWERSa covalent bond
The molecular shape of a biological molecule is important because __________. -
ANSWERSit determines how biological molecules recognize and respond to one
another
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