The significance of Fred Griffith's experiment
in which he used two strains of Streptococcus
pneumoniae is that
a. pathogenic bacteria function differently in
mice than in other organisms.
b. it demonstrated that harmless bacteria can
become transformed into disease-causing
bacteria by bacteria a transformation factor.
c. it established that pure DNA extracted from
disease-causing bacteria transformed
harmless strains into killer strains.
d. dead cells lose their genetic information.
e. the genetic material is DNA, not protein
B
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The figure shows a cladogram of direct development versus development of a larval stage. Choose the true statements about the evolution of development in limpets.
_____ Loss of structures in the transition from a larval stage to direct development prohibits evolutionary reversal.
_____ Direct development has evolved multiple times.
_____ Evolution always proceeds parsimoniously.
_____ Possession of a larval stage is the ancestral state in limpets.
Which of the following is not a product of fermentation?
A) lactate B) CO2 C) ethanol D) NAD+ E) sucrose
Into which group would you place a photosynthetic cell that lacks a nucleus?
A) Animalia B) Bacteria C) Fungi D) Plantae E) Protista
Describe the general relationship that may exist between mutations and cancer
What will be an ideal response?