A scientist has been tracking and studying a population of deer in Yellowstone National Park. He surveys the population every
six months. Usually, the population is thriving and has a gene pool with a wide variety of traits. But during one six-month
period, an event occurred that affected the population, and when the scientist returned, the amount of genetic variation had
decreased significantly. Which of the following is most likely the event that occurred to change the population?
Yellowstone National Park expanded its borders.
A population of wolves was introduced into Yellowstone National Park
The amount of disease in the deer population decreased
More grass and shrubs were planted in Yellowstone National Park

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

hope this   and an i get brainlsiest

d. groundwater flows through the subsoil and deposits minerals.