Horses went extinct in North America and did not return until they were ferried in boats by European settlers (no land mammal can swim on its own across an ocean). From a horse's perspective, the ocean barrier is best described as what?A. Acorridor. B. A filter. C. A sweepstakes route.

C. A sweepstakes route.

Explanation:

In biology, the movement of species in space is known as dispersal. A sweepstakes route is the least favorable dispersal mechanism by which a species migrate from place to place. This concept was developed by Simpson (1940) in order to describe a possible migration pathway which is unlikely but not impossible, thereby being used by some organisms. This route depends on the presence of a major barrier that is very difficult to cross, although it is occasionally crossed (such as, in this case, the ocean barrier).

oxygen +1 most likely

interphase

the period of cell growth when the cell synthesizes new molecules and organelles. the cell is not dividing and it constitutes the majority of the time spent in the cell cycle

prophase

changes occur in the nucleus and cytoplasm. the chromatin condenses to form structures (sister chromatids) visible with a light microscope and the mitotic spindle begins to form, but the nucleus is still in tact

prometaphase

the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the sister chromatids

metaphase

all the cell's duplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle

anaphase

begins when sister chromatids separate from each other and ending when a complete set of daughter chromosomes arrives at each of the two poles of the cell

telophase

the daughter nuclei form at the two poles of a cell

cytokinesis

the division of a cytoplasm to form two separate daughter cells. usually occurs during telophase during mitosis. this and mitosis make up to mitotic (m) phase of the cell cycle