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DrSamuels Is Using His Students in a Live Demonstration of the Visual

question 81

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Dr.Samuels is using his students in a live demonstration of the visual system.He has placed several students in a line and has asked each student to jump and down ONLY when a specific hand motion is given.He then assigns independent hand signals to each student.What aspect of the visual system might Dr.Samuels be demonstrating?


Definitions:

Radial Symmetry

A symmetrical arrangement in which body parts radiate out from a central point, common in animals like jellyfish and starfish.

Embryonic Opening

The embryonic opening refers to the blastopore, an early stage in the development of an embryo that can develop into the mouth or anus in different animal groups.

Chelicerates

A subgroup of arthropods that includes spiders, scorpions, ticks, and mites, characterized by the presence of chelicerae, which are claw-like mouthparts.

Crustaceans

Mostly marine arthropods with a calcium-hardened cuticle and two pairs of antennae; for example, lobsters, crabs, krill, and barnacles.

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