Which of the following represents change to an ecosystem brought by abiotic factors ?

Topographic maps are used to measure a-composition b-movement c-elevation d-texture

Which of the following expressions is equivalent to -1/4y - 2 1/4 + 1/2 (4-2y)? a. -3y + 2b. -3 1/2+4c. -4 1/2y+2d. -4 1/2y+2show ur work

Plants in the tundra biomes have had to adapt to live long periods of time without a. cool temperatures b. sunlight c. oxygen d. water