Ajogger is running cross-country and encounters a rattlesnake in a field. some of the jogger's organ systems will immediately activate while other are suppressed. which system listed is likely to be suppressed? a. muscular system b. respiratory system c. endocrine system d. digestive system

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.

Carbon compound that stores and transmits genetic information is called

Write a paragraph explaining how energy flows through an ecosystem using the following terms: energy pyramid, trophic level, producer, primary consumer, decomposer, sun, secondary consumer, and tertiary consumer. .