I believe the answer is a
The role of mass extinction in evolution. At the most basic level, mass extinctions reduce diversity by killing off specific lineages, and with them, any descendant species they might have given rise to. ... But mass extinction can also play a creative role in evolution, stimulating the growth of other branches.
The axons of the retina culminate in the optic nerve which forms a blind spot on the retina.
I hope this helps!
Answer:
IV: Student grade level (6th, 7th, 8th)
DV: "Loudness" (Operationalizing this variable would be beneficial, or in other words, define a way to measure it)
Explanation:
As the flower takes water that it needs to survive, the dye in it has no more density so it goes up with the water dying everything in its path blue.
