Outside the egg cell membrane is an extracellular matrix that forms a fibrous mat around the egg and is often involved in sperm-egg recognition. In invertebrates, this structure is usually called the:

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#Question id: 31252

#Unit 5. Developmental Biology

In some species, adult structures can undergo dedifferentiation to form a relatively undifferentiated mass of cells that then redifferentiates during morphogenesis of the new structure. Such regeneration is characteristic of:

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#Question id: 31253

#Unit 5. Developmental Biology

Which of the following regeneration occurs through the re-patterning of existing tissues?

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#Question id: 31254

#Unit 5. Developmental Biology

What molecular marker of head inducer is found in the hypostome of the hydra during head regeneration?

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#Question id: 31255

#Unit 5. Developmental Biology

When the hypostome is brought into contact with the trunk of an adult hydra, it induces expression of the__________ in a Wnt-dependent manner.

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#Question id: 31256

#Unit 5. Developmental Biology

If the Wnt signaling inhibitor GSK3 is itself inhibited throughout the body axis in hydra, results

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#Question id: 31257

#Unit 5. Developmental Biology

Which of the following gene is expressed by all neoblasts and has become the most common marker for their identification across planarian species?