An organ, such as the liver, is composed of _____.
a) organs
b) populations
c) communities
d) tissues - ANS-d) tissues
Which of these is an organ system?
a) stomach
b) mucosa
c) dog
d) digestive
e) gamete - ANS-d) digestive
What are the two main types of cells?
a) bacteria and archaea
b) plant and animal
c) bacteria and protists
d) prokaryotes and eukaryotes
e) bacteria and eukaryotes - ANS-d) prokaryotes and eukaryotes
DNA is composed of building blocks called _____.
a) nucleic acids
b) Gs
c) nucleotides
d) adenines
e) amino acids - ANS-c) nucleotides
In eukaryotic cells, DNA has the appearance of a _____.
a) single strand
b) letter U
c) double helix
d) triple helix
e) circle - ANS-c) double helix
Which of the following attributes is common to both prokaryotic cells and eukaryotic
cells?
a) the use of DNA as the information storage molecule
, b) a membrane-enclosed nucleus
c) membrane-enclosed organelles
d) generally about the same size
e) the use of proteins as information storage molecules - ANS-a) the use of DNS as the
information storage molecule
Competition is central to the theory of natural selection. Why does competition occur?
a) organisms typically produce too many offspring, and resources are limited
b) females must choose among possible mates
c) organisms are naturally antagonistic
d) males must defend their territories
e) all of the above are correct - ANS-a) organisms typically produce too many offspring,
and resources are limited
In order for a hypothesis to be able to be used in science, which of the following must
be true?
a) it must be reproducible
b) it represents established facts
c) it must be proven correct
d) it must be popularly accepted
e) it is testable and falsifiable - ANS-e) it is testable and falsifiable
Select the correct statement about the process of scientific inquiry.
a) the goal of scientific research is to prove a stated hypothesis
b) it is possible to test hypotheses, such as those involving historical events, without
conducting experiments
c) if the results of an experiment do not support the hypothesis that is tested, the
experiment is badly designed. - ANS-b) is it possible to test hypotheses, such as those
involving historical events, without conducting experiments.
What is the correct order for the hierarchy of biological organization from the least to the
most complex?
a) molecule, cell, tissue, organelle, organ, organ system, organism, population,
community, ecosystem
b) molecule, organelle, tissue, cell, organ, organ system, organism, population,
community, ecosystem
c) molecule, organelle, cell, tissue, organ, organ system, organism, population,
community, ecosystem