A control group
a. receives the same treatment as the
experimental group.
b. is an untreated group of individuals or
subjects.
c. is sometimes exposed to harsh conditions.
d. is often an unnecessary waste of material.
e. is not subjected to experimental error
B
You might also like to view...
Cyclic AMP is an example of a(n):
A. second messenger. B. ligand. C. effector or target protein. D. G protein.
All of these phyla are deuterostomes except for the:
1.Chordata 2.Echinodermata 3.Hemichordata 4.Nemertea
Select the following statements that are related to mass extinctions.
A. The most severe mass extinction occurred at the end of the Cretaceous period. B. Periods of mass extinctions have occurred five times over the history of life on Earth. C. The current level of species diversity is so high it is highly unlikely that another mass extinction could occur. D. A mass extinction occurs when extinctions sharply outpace the formation of new species. E. During periods of mass extinction, dominant groups of organisms are protected and survive to repopulate.
If an F2 generation from a self-cross always yields offspring in a 3:1 phenotypic ratio, which of the following P crosses could have occurred?
A) aa × Aa B) AA × AA C) AA × aa D) aa × aa E) Aa × AA