A young male baboon leaves the troop that he was born in and joins a small neighboring troop of small baboons. He quickly rises to become a dominant male. From an evolutionary point of view, what important process has occurred?
A) The bottleneck effect
B) Natural selection
C) Gene flow
D) Genetic drift
E) Nonrandom mating
C
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Which of the following represents
xenotransplantation?
a. cows resistant to mad cow disease b. goats that produce spider silk c. corn with Bt genes d. pigs carrying human livers e. more than one of these represents xenotransplantation
A cell wall can increase a bacterium's virulence because cell wall lipid A
A) All bacteria have a cell wall and all are not pathogenic; therefore, cell walls do not contribute to virulence. B) Helps the bacterium attach. C) Resists phagocytosis. D) Destroys host tissues. E) is toxic
In a karyotype of duplicated chromosomes, each chromosome contains two sister chromatids.
Answer the following statement true (T) or false (F)
Some diseases can be vertically transmitted. This is understood to mean the disease is transmitted
A) By contact between siblings B) From parent to offspring via respiratory route C) Between higher and lower animals D) Between people living or working in the same building E) From parent to offspring via milk, ovum, sperm, or placenta.