Which of the following statements is true regarding cell-cell adhesion?
A) Adhesion is coordinated with many cellular processes except cell survival.
B) Adhesion molecules include plakoglobulin, which cements two cells together.
C) Adherens junctions are exclusive to plant cells.
D) Adhesive junctions are characterized by the attachment of long molecules of hyaluronate.
E) Adhesive junctions are dynamic in response to cellular signals.
E) Adhesive junctions are dynamic in response to cellular signals.
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Among the bryophytes, which of the following contain distinct stemlike axis, small leaves, and rootlike rhizoids?
A. liverworts B. hornworts C. mosses D. algae E. cycads
Diploid stage(s) is(are) indicated by
a. A. b. B. c. C. d. D. e. B, C, and D.
Which one of the following is TRUE regarding bone repair?
A) Fibrocartilage degenerates where the two broken ends of the bone were once together. B) Osteoblasts convert cartilage to bone in the injured area. C) Immediately after breaking a bone, a hematoma breaks free from the injured area. D) Bones heal more quickly as individuals age. E) The repaired area of a bone is much thinner than the original bone.
After mixing a heat-killed, phosphorescent (light-emitting) strain of bacteria with a living, nonphosphorescent strain, you discover that some of the living cells are now phosphorescent
Which observation(s) would provide the best evidence that the ability to phosphoresce is a heritable trait? A) evidence that DNA was passed from the heat-killed strain to the living strain B) evidence that protein passed from the heat-killed strain to the living strain C) especially bright phosphorescence in the living strain D) phosphorescence in descendants of the living cells