Slope slōp/ noun 1. a surface of which one end or side is at a higher level than another; a rising or falling surface. a difference in level or sideways position between the two ends or sides of a thing. synonyms: gradient, incline, angle, slant, inclination, pitch, decline, ascent, declivity, rise, fall, tilt, tip, downslope, upslope, grade, downgrade, upgrade "the slope of the roof" a part of the side of a hill or mountain, especially as a place for skiing. synonyms: hill, hillside, hillock, bank, sidehill, escarpment, scarp; More verb 1. (of a surface or line) be inclined from a horizontal or vertical line; slant up or down. synonyms: slant, incline, tilt; More
If a species is said to be extinct, then that species is reduced to zero. There are none living in existence. The affects to other organisms of its extinction would depend on their value to the ecosystem. Regardless, extinction completely stops evolution of the species extinct.
