Which of the following statements is true?

the matter in an ecosystem must be continuously replenished.

the total amount of engery in an ecosystem remains the same.

the only way to return matter to the soil is decomposition.

the total amount of water in an ecosystem is always decreasing.

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation

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 !

Where can dna be found in a prokaryotic cell