A is a 1-mm block of striate cortex containing two sets of columns, each covering every possible orientation (0–180 degrees), with one set preferring input from the left eye and the other set preferring input from the right eye.

The answer is "Hypercolumn"

Step-by-step explanation:

is a set of sections that work as a unit that enables us to see one specific portion of a visual field. It is consist of at least two columns; containing information from the left eye, and information from the right eye.

They are arranged across the surface of the primary visual cortex in a retinotopic pattern.

Check attached for a pictorial representation.

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

i belive those are the ones that are under 90 degreese.