The casual-comparative design is used when
a. the independent variable cannot be manipulated by the researcher.
b. it is not possible to assign subjects to different treatments.
c. the independent variable being investigated is one that already characterizes an individual.
d. variation is an independent variable occurring in the natural course of events.
e. All of these are true.
Question 2
Research has ____ validity when it shows the findings can be generalized beyond the limits of the study.
a. internal c. construct
b. external d. operational
Comparative profiles of the lion and tiger.
Meiosis Accounts for Independent Assortment of Alleles p1
The Punnett square of a dihybrid cross demonstrates Mendel’s law of independent assortment.
Sample of a business card design.
Variable expressivity as shown in flies homozygous for the eyeless mutation in Drosophila
Separation of variable number tandem repeat (VNTR) alleles after PCR amplification