#Question id: 7193
#Unit 5. Developmental Biology
Some statements with respect to the regeneration in hydra.
A. The major head inducer of the hypostome organizer is a set of Wnt proteins acting through the canonical B-catenin pathway.
B. The major head inducer of the hypostome organizer is a set of Wnt proteins acting through the noncanonical B-catenin pathway.
C. These Wnt proteins are seen in the apical end of the early bud, defining the hypostome region as the bud elongates
D. If the Wnt signaling inhibitor GSK3 is itself inhibited throughout the body axis, ectopic tentacles form at all levels, and each piece of the trunk has the ability to stimulate the outgrowth of new buds.
E. transgenic hydra made to globally misexpress the downstream Wnt effector ectopic tentacles form at all levels, and each piece of the trunk has the ability to stimulate the outgrowth of new buds.
Which of the following statements are incorrect?
#Question id: 28871
#Unit 4. Cell Communication and Cell Signaling
Wnts are___
#Question id: 24213
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 3478
#Unit 11. Evolution and Behavior
Natural selection may favour the evolution of foraging behaviours by predator that
#Question id: 2244
#Unit 2. Cellular Organization
Arrange the statements below in the proper sequence of events that occur in an action potential:
I. The resting potential is re-established.
II. A stimulus depolarizes the membrane to threshold.
III. Na+ gates open and Na+ rushes into the cell.
IV. K+ gates open and K+ rushes out of the cell.