Adherens junctions ______________________
(a) can be used to bend epithelial sheets into tubes.
(b) are most often found at the basal surface of cells.
(c) are found only in adult tissues.
(d) involve fibronectin and integrin interactions.
(a)
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Which of the following statements is true?
a. Enzymes bond to macromolecules during condensation and detach during hydrolysis. b. Enzymes may act on any macromolecule within the same class as its primary reactant. c. Each type of enzyme serves as a catalyst for only one specific macromolecule. d. Enzymes only act during dehydration synthesis, never during hydrolysis.
If a structure has no apparent function in one species, yet is homologous to a functional organ in another species, this structure is termed
A. homeotic. B. analogous. C. homologous. D. heterologous. E. vestigial.
Flowers consist of modified leaves (sepals, petals, __________, and __________ ) at the ends of
specialized branches. Fill in the blank(s) with the appropriate word(s).
An atom that is considered inert is
a. oxygen. b. hydrogen. c. nitrogen. d. carbon. e. helium.