Human cells as well as plant and animal cells
Answer:
Protostars are difficult to observe because they are surrounded by cocoons of gas and dust.
Albedo feedback is a positive feedback climate process where a change in the area of ice caps, glaciers, and sea ice alters the albedo and surface temperature of a planet. ... However, if warm temperatures decrease the ice cover and the area is replaced by water or land the albedo would decrease.
Because with maps they knew where to go , without them they will be lost
