Orca used in a sentence

Orca in a sentence as a noun

Certain species of whales, including Orcinus orca, the killer whale, exhibit early-life menopause, and form stable matrilineal groups, making them ideal candidates for testing the grandmother hypothesis. Interestingly, studies on killer whales observe no significant correlation between living grandmothers and grandoffspring survival rates, though there are plenty of unaddressed confounding factors.