填空题
A Craig Venter is an unconventional scientist.
B Venter has no scientific qualifications.
C Carbon is used to make shells for sea creatures.
D The Sargasso Sea has long been thought of as not rich in life.
E The genes Venter has discovered are interesting, but scientifically useless.
F Venter wants to make bacteria resistant to viruses.
G Microbes may use sunlight as energy but without photosynthesis.
H Bacteria can protect microbes from too much sunlight.