Practice Test 1 Flashcards
Which of the following would be a characteristic of life?
a)Acquires energy
Water has a high heat of vaporization largely because
c) Hydrogen bonds form between the hydrogen atoms of one water molecule and the oxygen atoms of other water molecules
What is a hypothesis?
a) a testable question
The middle electron shell of an atom that has three full shells contains__electrons
b) 8
What is the basic difference between covalent and ionic bonds?
b) In covalent bonding, the partners share a pair(s) of electrons; in an ionic bond, one partner captures an electron from the other
The most basic independent unit of life is the
b) Cell
The bonds that are broken when water vaporized are
c) Hydrogen bonds between water molecules
Why does ice float on water?
c) Hydrogen bonds keep the molecules of ice farther apart than in liquid water
Sugars dissolve in water. This property is called
b) Hydrophilia
The level of organization that includes cells of similar structure and function would be a(n)
b) Tissue
After formulating a hypothesis, a scientist
b) Tests the hypothesis
The Gaia hypothesis states that
d) The earth is one huge ecosystem and environmental problems should be addressed with this in mind
According to the 2nd Law of Thermodynamics, energy transformations usually lose energy in what form?
a) Heat
Bioformatics is
a) The use of software that extracts information from high-throughput technology
“Life on this planet is mostly made up of carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur. Therefore, when looking for life on other planets, we should search for these same molecules.” This is an example of
a) a hasty generalization
b) an inductively valid argument
c) a conclusion based on biased statistics
* *d) all of the above
“Geneology replaces cosmogeny” is the description of whose contribution to philosophy?
b) Hesiod
What is “aer”?
a) A mist that changes properties corresponding to density
An artist’s paining of a vase is a poor and imperfect reflection of another poor and imperfect reflection. This is an example of whose philosophy?
b) plato
In order to understand the chemicals basis of inheritance, one must understand the molecular structure of DNA. This is an example of the application of ___to the study of biology.
d) reductionism
Once labor begins in childbirth, contractions increase in intensity and frequency until delivery. The increasing labor contractions of childbirth are an example of
c) positive feedback
Which branch of biology is concerned with the naming and classifying of organisms?
e) taxonomy
Prokaryotes are classified as belonging to two different domains. What are the domains?
c) Bacteria and Aechaea
All the organisms on your campus make up a?
c) a community
Which of the following is an example of qualitative data?
seconds
c) The fish swam in a zigzag motion
Which of the following statements is false?
c) Protons and electrons are electrically charged particles. Protons have one unit of negative charge, and electrons have one unit of positive charge.
Each element is unique and different from other elements because of the number of protons in the nuclei of its atoms. Which of the following indicates the number of protons in an atom’s nucleus?
b) atomic number
The mass number of an element can be easily approximated by adding together the number of ___ in an atom of that element.
d) protons and neutrons
Which of the following sequences represents the hierarchy of biological organization from the least to the most complex level?
d) molecule, cell, organ system, population, ecosystem, biosphere
What is the maximum number of electrons in the 1s orbital of an atom?
b) 2
What results from an unequal sharing of electrons between atoms?
a) a polar covalent bond
The ionic bond of sodium chloride is formed when
a) chlorine gains an electron from sodium
Why is the Tennessee Valley known as the “valley of sickness”?
d) Biodiversity is so great that the likelihood of an individual being allergic to something local is high
Which of the following is an example of an organ system?
c) a nervous system
Which of the following is an example of a population?
d) King snakes in Madison County
Which of the following is not an example of an ecosystem?
a) a fruit fly
b) a rotting log
c) planet Earth
d) the Amazon River basin
a) a fruit fly
A vulture is a
b) consumer
What does a photosynthetic autotroph convert into food?
b) light
A catabolic reaction
a) decomposes
The genetic code
c) is universal and well understood
A metabolic reaction that digests or decomposes is said to be
c) Catabolic
Who is generally credited with the first description of scientific method?
b) Aristotle
“All cats in my neighborhood are white, and all cats in Alabama would be white except that undetectable alien beings have cleverly introduced cats of other colors to fool us into thinking that cats come in many colors. “ Why is this NOT a hypothesis?
d) it is not testable
What do scientists use in reporting data in order to reduce experimental bias?
a) Objective methods
Ghostbusting by means of handheld electromagnetic radiation detectors, computer-controlled cameras, sophisticated thermometers and recording of low-frequency sound waves is
d) a pseudoscience
An atom
d) Is the smallest unit to retain the properties of an element
95% of the human body is composed of elements found in the following mnemonic:
a) SHNOPS
b) CHOMPS
c) CHNOPS
d) SCHNAPPS
c) CHNOPS
What type of bond is formed by the sharing of electrons to complete the valence shell?
c) Covalent
Which of the subatomic particles contributes almost no weight to an atom?
d) Electrons at various energy levels
Radioactive elements differ in their?
c) Number of neutrons
An atom that has two electrons in the outer shell, such as calcium, would most likely
c) Lose these two electrons and become a positively charged ion
