What bond angle is most closely associated with a linear distribution of electron density?
A) 90°
B) 109.5°
C) 120°
D) 180°
D
Environmental & Atmospheric Sciences
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Fish with limbs containing a fleshy shaft and a series of articulating bones:a
acanthodians d. lobe-finned fish b. chordates e. sharks c. amphibians
Environmental & Atmospheric Sciences
The part of a plant that is best preserved and can most easily be used for climate reconstruction is:
A) the pollen. B) the root structure. C) the leaf vein. D) the flower.
Environmental & Atmospheric Sciences
Overall, as many as two ________ new marine and terrestrial species are discovered each year
A) dozen B) hundred C) million D) score E) thousand
Environmental & Atmospheric Sciences
The core of a comet is composed of
A. molten iron B. liquid hydrogen C. frozen gases and dust D. uranium
Environmental & Atmospheric Sciences