#Question id: 15329
#Unit 4. Cell Communication and Cell Signaling
#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: 32402
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 4614
#Unit 11. Evolution and Behavior
Which of these is the extant (that is, living) species most closely related to species X?
#Question id: 11508
#Unit 9. Diversity of Life Forms
Which of these taxa contains species that produce potent toxins that can cause extensive fish kills, contaminate shellfish, and poison humans?