The two longitudinal ridges on the medulla oblongata where many descending fibers cross over are called the
a. lateral horns
b. pyramids
c. olives
d. nuclei

Pyramids.

Explanation:

Medulla oblongata is one of portion of the hind brain that are responsible for controlling the autonomic functions of the body. Medulla oblongata lies to the inferior portion of the pons.

Pyramids are the two round mass of the white matter that are either located on the anterior of the median fissure. The nerve fibers are involved in the connection of the medulla to the pons, spinal cord and cerebral coretx. The fibres may gets cross over at pyramids.

Thus, the correct answer is option (b).

pyramids

Explanation:

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.

so whats the answer