Which ecosystem is least able to sustain its organisms during a period of environmental stress A Desert
B Grassland
C Rainforest
D Artic

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

Contrast how pollination is different among gymnosperms and angiosperms.

Ecology can best be described as the study of what