According to This Figure, at What Time in the Evolutionary

question 21

Multiple Choice

According to this figure, at what time in the evolutionary history of plants did vascular systems likely first evolve?

• A) 475 mya
• B) 460 mya
• C) 425 mya
• D) 360 mya

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Definitions:

Magnocellular Cells

Magnocellular cells are large neurons located in the hypothalamus, part of the neuroendocrine system, involved in the release of hormones like vasopressin and oxytocin.

Parvocellular Cells

Neurons within the parvocellular layer of the lateral geniculate nucleus of the thalamus, involved in high-resolution color vision and fine visual details.

Visual Signals

Information perceived through the eyes and interpreted by the brain, involving light being converted into electrochemical signals for visual processing.

Trichromatic Color Theory

A theory stating that the human eye perceives color through the relative rates of response by three types of cones, each sensitive to different wavelengths of light (red, green, and blue).