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In International Studies of Reading, Mathematics, and Science Achievement, U

question 56

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In international studies of reading, mathematics, and science achievement, U.S. students typically perform


Definitions:

Deuterostomes

Organisms characterized by undergoing deuterostomy during embryonic development, where the anus forms before the mouth.

Blastopore

The opening formed during early embryonic development in animals, which can develop into the mouth or anus depending on the species.

Radial Cleavage

A pattern of animal embryonic development in which the divisions of the egg are symmetrical around the polar axis, typical of deuterostomes.

Vertebral Column

The spine, the rigid, bony structure in the midline of the back; composed of vertebrae.

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