Answer: natural killer cell
Explanation:
Natural killer cells are referred to as the granular lymphocytes which play vital roles in the immunity against viruses. It doesn't need antigenic activation in order to detect and kill pathogens.
When an enemy cell is present, a natural killer cell secretes perforins, which bore a hole in the enemy cell membrane.
The Prairie dogs habitat is where the Prarie Dog lives in an ecosystem, a prairie dogs niche is what role it has in the ecosystem.
Latitude and ocean currents are the ones i know.
Explanation:
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