Which of the following statements is false? Typically, one surface of an epithelial tissue layer:a
is attached to a basement membrane.
b. is freely exposed.
c. lines cavities.
d. consists of loosely packed cells with several intermediate spaces.
e. covers body surfaces
D
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Sea urchins and sand dollars fall into which of the following Echinoderm classes?
a. Ophiuroidea b. Crinoidea c. Echinoidea d. Holothuroidea
A plant species where each plant can only make either male or female flowers is called a ____ species
and always has ____ flowers.
a. monoecious; complete b. dioecious; imperfect c. dioecious; complete d. monoecious; imperfect e. monoecious; perfect
DNA and RNA are similar in that both
a. contain the same sugar. b. are double-stranded molecules. c. contain nitrogenous bases. d. are in the form of a double-helix. e. are very long molecules.
The lac O1 operator
a. lies completely upstream of the transcription startpoint. b. has a palindromic sequence. c. binds the inducer. d. encodes a short regulator RNA. e. binds RNA polymerase.