Which type of water is the least dense?
a. warm water with no salt
b. warm, salty water
c. cold, salty water
d. cold water with no salt

The zone, which exists from a depth of 0 to 600 feet, is home to the majority of ocean life.

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these