Biology Final Exam Review
In the experimental evaluation of a new drug, what is the purpose of a placebo?
A placebo removes the potential psychological bias of the patient in the study.
What would be the ultimate effect on an ecosystem if decomposers were eliminated?
All life would eventually cease as nutrients would no longer be available.
Which statement best describes the cell theory?
All living organisms are composed of basic units called cells.
What represents the most basic level of chemical organization?
Atom
Which statement best describes autotrophic organisms?
Autotrophs synthesize complex molecules from CO2, water, and energy.
What is an end product of cellular respiration?
Carbon dioxide
To which Phylum do humans belong?
Chordata
What type of molecule carries the hereditary information of an organism?
DNA
What are units of hereditary information?
Genes
Information in living organisms is transmitted by which mechanism(s)?
Genes, hormones, and neurotransmitters
Suppose a particular protein is produced in excess of the cell's needs. What kind of mechanism will intervene to stop production?
Homeostatic
The primary purpose of homeostasis is to:
Maintain a constant internal environment
Using the Linnaean system of nomenclature, corn is named Zea mays. What is the specific epithet in this name?
Mays
Which scenario best describes a double-blind study?
Neither the investigator or the subjects know if they are in the experimental or control group.
A DNA molecule is made up of:
Nucleotides
Similar families of organisms are next grouped together in the same:
Order
All of the members of the same species occupying the same area at the same time constitute a(n):
Population
Which process is most directly associated with the theory of evolution?
Populations changing over time
What large molecules are essential in determining the structure and function of cells and tissues?
Proteins
A hypothesis can best be described as a(n):
Tentative explanation
Which is a benefit of sexual reproduction over asexual reproduction?
The interaction of the genes from both parents brings about genetic variation.
What statement best describes "biology"?
The science of life
During an experiment, what is the purpose of a control group?
To compare results to the experimental group with the variable being tested
Which best describes a result of sexual reproduction?
Two sex cells combine to form a fertilized cell.