Search
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_2%3A_The_Physical_Environment/2.5%3A_Earth's_Energy_BalanceEarth’s temperature depends on the balance between energy entering and leaving the planet. When incoming energy from the sun is absorbed, Earth warms. When energy is released from Earth into space, th...Earth’s temperature depends on the balance between energy entering and leaving the planet. When incoming energy from the sun is absorbed, Earth warms. When energy is released from Earth into space, the planet cools. Many factors, both natural and human, can cause changes in Earth’s energy balance, including changes in greenhouse gasses; variations in the sun’s energy reaching Earth; and changes in the reflectivity of Earth’s atmosphere and surface.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/15%3A_The_Anatomy_and_Physiology_of_Animals/15.01%3A_Nutrition/15.1A%3A_The_Human_Gastrointestinal_TractThis page discusses the extracellular digestion process in humans and animals, involving digestive enzymes that break down food in structures like the stomach, liver, and small intestine. The liver re...This page discusses the extracellular digestion process in humans and animals, involving digestive enzymes that break down food in structures like the stomach, liver, and small intestine. The liver regulates nutrient absorption, while the pancreas provides essential enzymes. The small intestine, with microvilli enhancing absorption, covers a large surface area.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/16%3A_The_Anatomy_and_Physiology_of_Plants/16.02%3A_Plant_Physiology/16.2A%3A_XylemThis page discusses how plants absorb water and nutrients through their roots, which travel to leaves via the xylem, primarily driven by transpiration. This process creates tension that can lead to ca...This page discusses how plants absorb water and nutrients through their roots, which travel to leaves via the xylem, primarily driven by transpiration. This process creates tension that can lead to cavitation. Additionally, it explains root pressure, which can cause sap to ooze from stems, illustrated by the sugar maple's spring behavior.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/02%3A_The_Physical_Environment/2.05%3A_Earth's_Energy_BalanceEarth’s temperature depends on the balance between energy entering and leaving the planet. When incoming energy from the sun is absorbed, Earth warms. When energy is released from Earth into space, th...Earth’s temperature depends on the balance between energy entering and leaving the planet. When incoming energy from the sun is absorbed, Earth warms. When energy is released from Earth into space, the planet cools. Many factors, both natural and human, can cause changes in Earth’s energy balance, including changes in greenhouse gasses; variations in the sun’s energy reaching Earth; and changes in the reflectivity of Earth’s atmosphere and surface.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_102_Laboratory_Manual%3A_Biology_of_Plants_and_Animals_(Ray_and_Jones)/01%3A_Chapters/1.04%3A_Chapter_4This page covers the learning objectives for laboratory activities on the digestive system, including the anatomy and functions of digestive organs, and the processes of mechanical and chemical digest...This page covers the learning objectives for laboratory activities on the digestive system, including the anatomy and functions of digestive organs, and the processes of mechanical and chemical digestion. It highlights the roles of saliva, enzymes, and the small and large intestines in digestion and nutrient absorption.
