In cocker spaniels, black coat color (B) is dominant
over red (b), and solid color (S) is dominant over
spotted (s). A cross of Bb Ss with bb ss will produce
the phenotypic ratio
a. 9:3:3:1.
b. 1:1:1:1.
c. 1:2:1.
d. 3:1.
e. of none of these.
Answer: b
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Griffith first proposed the "transformation principal" through his studies on Streptococcus pneumoniae bacterium. Which of the following molecules was later found to be responsible for this phenomenon?
A. protein. B. RNA. C. DNA. D. phage. E. bacteriophage.
Which of the following lipids makes up most
of a plasma membrane?
a. phospholipids b. cholesterol c. triglycerides d. steroids e. more than one of these
One current goal of cloning is to ____
a. duplicate certain humans b. create new species c. promote evolution d. experiment with alien DNA e. increase the numbers of endangered animals
Carolus Linnaeus
A. created the five-kingdom classification system. B. was the first person to attempt to systematically classify organisms. C. introduced the binomial system of nomenclature. D. developed a theory of evolution based on the similarities between organisms.