Which of the following statements cannot be applied to the extrusive igneous rock obsidian? 
Definitions:
Hormones
Chemical substances produced in the body that regulate the activity of cells or organs, essential for every activity of life, including the processes of digestion, metabolism, growth, reproduction, and mood control.
Mammary Lobules
Glandular structures within the breast that contain clusters of milk-producing alveoli; they are responsible for milk production during lactation.
Prolactin
Hormone secreted by the anterior pituitary that stimulates the production of milk from the mammary glands.
Lifestyle Choices
Decisions made by individuals regarding their daily habits and practices, affecting their health and well-being.
Q1: The broad flat regions that occupy most
Q19: What were the key motives behind the
Q24: Compare the oceanic crust to the continental
Q29: Which of the following does not affect
Q34: Draw a cross-section of the Earth showing
Q37: When two continental plates come together at
Q42: A black,organic-rich shale could likely serve as
Q44: If an earthquake's magnitude is measured based
Q48: Which environment would most likely produce sedimentary
Q51: Wegener's proposal that the continents had once