The White Cliffs of Dover, a famous landmark in England, is made of limestone, which is really a collection of the pore-studded shells (tests) of
A. foraminifera.
B. brown algae.
C. dinoflagellates.
D. diatoms.
E. spirochetes.
Answer: A
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True or false: In general, allopatric species will develop pre-zygotic isolating mechanisms more rapidly than sympatric species
A. true B. false
In light-dependent reactions, hydrogen ions are transported into the thylakoid membrane. What drives the
movement of these ions?
a. passive diffusion of ions from high to low concentration b. passive diffusion of ions from low to high concentration c. active transport of ions driven by the hydrolysis of water into oxygen d. active transport of ions driven by energy from the electron transport chain e. active transport through the enzyme ATP synthase
The most critical level of eukaryotic genetic control is ________ control.
A. translational B. posttranslational C. feedback D. transcriptional E. posttranscriptional
The human species first appeared in the
A) Cretaceous period. B) Permian period. C) Tertiary period. D) Quaternary period. E) Jurassic period.