Purple Sea Urchin is distinguished by what characteristics? (Pick two) * 10 points
Longer spines on top and smaller flat spines below
Purplish spines are sharp cones above and flattened paddles underneath
Yellowish spines are sharp cones above and flattened paddles underneath
Transparent spines are sharp cones above and flattened paddles underneath

ok yes, but what is the question? as soon as you ask the actual question i will answer it. : )

answer;

c. a tree whose roots are surrounded by wet sand.

explanation;

water stress is an important factor limiting the growth and productivity of forests.water stress is the most often cited cause of poor survival and growth of woody landscape plants.

-insufficient soil moisture is the most common form of water stress, but excess moisture that leads to poor soil aeration (hypoxia) can also result in reduced plant vitality. a tree whose roots are surrounded by wet sand would be least likely to experience water stress.

answer increasing the intensity, duration,and frequency of exercise progressively;