Refer to the Figure Showing Cytoplasmic Factors in a Fertilized

question 124

Multiple Choice

Refer to the figure showing cytoplasmic factors in a fertilized frog egg. Suppose a researcher experimenting with the frog egg shown in part A removes the vesicles containing the GSK-3 inhibiting protein.What will be the most likely result of this experiment?

• A) The embryo will develop into two larvae joined belly-to-belly.
• B) No dorsal-ventral axis will be established in the embryo.
• C) Anterior structures will form, but posterior structures will not form.
• D) Two sets of dorsal structures will form.
• E) An embryo with two dorsal-ventral axes will form.

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Definitions:

Composite Volcano

A type of volcano constructed from multiple layers of hardened lava, tephra, and volcanic ash, typically characterized by explosive eruptions.

Shield Volcano

A broad, gently sloping volcano formed by the eruption of fluid basaltic lava.

Scoria Cone

A small, steep volcanic cone made of volcanic ash, cinders, and bomb fragments ejected from a single vent.

Dome

1. A circular or elliptical anticlinal structure in which the rocks dip gently away in all directions. 2. A dome-shaped accumulation of lava and other volcanic materials. See also volcanic dome.