Answer:
Hydras live in fresh water environments, while sea anemones live in MARINE environments! Hydra, although primarily sessile (sedentary), may move up to several inches in a day.
Answer:
Ripples in water are more formally known as capillary waves, and are caused by the subtle interaction of wind and water, or the physical interaction of the water with another object.
Answer:
One Idea was the appreciation that the age of the Earth was much greater than had hitherto for been imagined.
