Which flow of electrons is correct?
a. NADPH - photosystem II - Photosystem I - water
b. Water - photosystem II - NADPH - Photosystem I
c. Water - photosystem II - Photosystem I - NADPH
d. Water - NADPH - photosystem II - Photosystem I
e. Water - photosystem I - Photosystem II - NADPH
c
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Simberloff and Wilson carried out a famous experiment to study the recolonization by arthropods of small mangrove by islands after the islands were fumigated. One of their findings was
A. several species of birds were facilitators of recolonization. B. species turnover was high following recolonization. C. recolonization was identical on all of the islands regardless of size. D. species richness changes little following recolonization. E. high diversity relative to the mainland.
Integrase
A. is required for prophage formation. B. cuts viral genomes. C. is required for genome entry into the bacteria. D. is required for provirus formation. E. cuts the viral genome and is required for both prophage and provirus formation.
The annual risk of death from lighting is 47 times the risk of death from shark attack
Indicate whether the statement is true or false
At about what point in gestation can an ultrasound exam determine the sex of the fetus?
A) about 4 weeks after fertilization B) at the end of the first trimester C) about 20 weeks after fertilization D) at the end of the second trimester