Swallowing is a complex process that involves signaling between the pharynx and swallowing center in the brainstem. Which of the following structures is critical for determining whether a bolus of food is small enough to be swallowed?

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#Question id: 5550

#Unit 5. Developmental Biology

The vertebrate nervous system is derived from

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#Question id: 5551

#Unit 5. Developmental Biology

When the vertebrate embryo grows into a hollow ball, it is called a

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#Question id: 5552

#Unit 5. Developmental Biology

Soon after gastrulation, dorsal ectodermal cells condense and form a tube called the _______________ tube.

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#Question id: 5553

#Unit 5. Developmental Biology

The notochord is a ___ structure in vertebrate embryos that lies under the ___, and is bordered by ___.

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#Question id: 5555

#Unit 5. Developmental Biology

The formation of the fertilization envelope requires an increase in the cytosolic concentration of ________.

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#Question id: 5556

#Unit 5. Developmental Biology

Contact of a sea urchin egg with signal molecules on sperm causes the egg to undergo a brief ________.