Plant surfaces are covered and protected by ____
a. ground tissue
b. protoderm
c. vascular tissue
d. meristem
e. dermal tissue
ANSWER: e
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In a dihybrid testcross, the individual being examined is crossed to which of the following?
A. An individual who is homozygous dominant for one trait but not the other B. Self-fertilized C. An individual who is homozygous recessive for both traits D. An individual who is heterozygous for both traits
Ernest Rutherford's key experiment on alpha particle bombardment of gold foil was important to the development of
A. detection methods for protons. B. alpha particle emitters. C. gold as an element. D. the modern model for atomic structure. E. the concept that atoms have a homogenous distribution of protons throughout the atom.
Chemicals released by plants to inhibit germination and establishment of other species is known as
A) consumption. B) allelopathy. C) toxicopathy. D) competitive exclusion.
If autophosphorylation of CheA protein does not occur, then Escherichia coli cells must be ________.
A. in a gradient of a chemoattractant B. tumbling C. in a gradient of a chemorepellant D. rotating flagella clockwise