Photosynthetic activity of the algae is vital to the survival of the coral animals, which use the energy to extract calcium from the seawater and
build their calcareous skeletons. The zooxanthellae are protected by the hard coral
and obtain plant nutrients from the coral.

Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. he used a golf ball, a tennis ball, and a soccer ball. he dropped each ball from the balcony once. diego recorded his observations after each drop. what can diego do to best improve the reliability of his results? a) drop each ball from the platform three more times b) record his observations in more than one unit c) write at least two scientific questions after the experiment is complete d) share his results with other people who have done similar experiments you for the !

Describe characteristics of a good respitory surface

Afive-year study was carried out on a population of algae in a lake. the study found that the algae population was steadily decreasing in size. over the five-year period this decrease most likely led to