Which of the following statements is true related to hormones that regulate blood calcium levels? 1. Calcitonin causes bone to be broken down. 2. Calcitonin is released by the parathyroid gland to help lower blood calcium levels. 3. Parathyroid hormone is released by the parathyroid gland to help lower blood calcium levels. 4. Calcitonin is released by the thyroid gland to help lower blood calcium levels.

Which statement best describes a typical difference that could be found between the "analysis" and "conclusion" sections of a lab report? a) only the "conclusion" describes errors that occurred during the experiment, and only the "analysis" section suggests further research.b) only the "analysis" section includes specific data comparisons, and only the "conclusion" section suggests further research.c) only the "analysis" section discusses whether the original hypothesis was supported, and both sections include graphs of data.d) only the "conclusion section discusses whether the original hypothesis was supported, and both sections suggest further research.(the answer is b i just took the test)

This is the interaction of two organisms where one is and the other is neither nor harmed.

Which spheres are involved when sedimentary rocks formed from parts of seashells at the bottom of the ocean? a.) biosphere, atmosphere, geosphereb.) geosphere, hydrosphere, biosphere c.) geosphere, exosphere, hydrosphered.) hydrosphere, biosphere, atmosphere