Hydrogen ion flow out of the thylakoid
compartments
a. occurs between photosystems I and II.
b. is called hydrogen transfer system.
c. provides energy to produce ATP molecules.
d. causes excitation of chlorophyll molecules.
e. requires the intermediary action of acceptor
molecules.
C
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Prokaryotic cells generally reproduce by ____
a. mutation b. binary fission c. conjugation d. transduction e. transformation
The covalent bond between a hydrogen atom and the oxygen atom in water is formed when:
a. hydrogen gains an electron from oxygen. b. hydrogen and oxygen share an electron pair. c. hydrogen and oxygen both lose electrons from their outer shells. d. hydrogen and oxygen both gain electrons in their outer shells. e. hydrogen gains an electron from oxygen.
What are the functions of the sinuses?
A. to lighten the skull and drain fluid from the brain B. to allow the brain to expand and to lighten the skull C. to give a resonant sound to the voice and to allow the brain to expand D. to drain fluid from the brain and to allow the brain to expand E. to lighten the skull and give a resonant sound to the voice
Which skeletal feature did NOT enhance hominin bipedal locomotion?
a. broader pelvis
b. alignment of the toes c. complex curvature of the spine d. foreman magnum at the center base of skull e. foreman magnum at the center rear of skull