Answer:
Means to increase drag and prevent sinking is the correct answer.
Explanation:
Plankton avoid sinking by increasing their surface area and decreasing their density. Spines slow down sinking by adding surface area without increasing density. Defense against predation would be to sing below. Not the opposite.
Store energy, provide metabolic fuel and help in digestion
Answer:
True, planets are round because of gravity
Activation energy - is the minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction.
