An ecologist named Mark wants to control water pollution at a source that has biodegradable pollutants. Which method should Mark use? A. biological action
B. carbon sequestration
C. incineration
D. conservation tillage

Does the sun release radiant energy?

This is collection of data made by comparing objects in standard units. in science, the units are metric.

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.