Which of the following diseases is NOT caused by an ascomycete?
A. apple scab
B. wheat rust
C. powdery mildew
D. chestnut blight
E. Dutch elm disease
B. wheat rust
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Four of the five answers listed below are
characteristics of eudicots. Select the EXCEPTION.
a. two cotyledons b. flower parts in four or fives or multiples of these numbers c. leaf veins running parallel d. pollen grains with three pores or furrows e. vascular bundles organized in a ring in the ground tissue
The thin, circular layers of compact bone are called
a. osteoblasts. b. epiphyseal plates. c. osteoclasts. d. osteons. e. spicules.
Salinity within an estuary is greatest in
A) surface water at high tide. B) surface water at low tide. C) deep water at high tide. D) deep water at low tide.
The voltage of 70 millivolts that exists across the nerve cell membrane is caused by the
A. depolarization of the cell membrane. B. active transport of sodium ions out of the cell. C. diffusion of potassium ions into the cell. D. acetylcholine binding to the dendrite.