Energy is required by all living organisms to maintain life and for growth and reproduction. Autotrophs capture free energy from the environment through photosynthesis or chemosynthesis and store it in carbon compounds. Most cells of both plants and animals harvest this energy through cellular respiration, which converts ADP to ATP. ATP is used for almost all cellular activities that require energy. This investigation requires that you know and be able to apply scientific concepts and demonstrate scientific competence in designing and analyzing an experiment. You will work through the following steps: Review the reactants and products of cellular respiration. Learn how to measure the rate of cellular respiration in germinating peas in the laboratory. Practice analyzing data from an experiment measuring the rate of cellular respiration. Apply your understanding of factors that affect the rate of cellular respiration to predict experimental results in novel experiments.

Bisphenol a (often called bpa) is a chemical found in products that people use every day, from water bottles to food containers to children's toys. unfortunately, bpa leaches out of its many products and makes its way into our bodies. what are the health effects of bpa exposure? ongoing research is finding that elevated exposure to bpa can affect a wide variety of developmental and physiological processes, but one of the first studies of bpa's health effects came about because of a simple mistake in the lab. at a laboratory at case western reserve university in 1998, geneticist patricia hunt was making a routine check of her female lab mice. as she extracted and examined developing eggs from the ovaries, she began to wonder what had gone wrong. she noticed that many of the eggs showed problems with their chromosomes, and some had irregular amounts of genetic material, which can lead to miscarriages and birth defects in mammals. she learned that a lab assistant had mistakenly washed the plastic mouse cages and water bottles with a harsh soap, releasing bpa from the plastic. knowing that bpa is an endocrine disruptor, a chemical that can enter organisms and mimic hormones, hunt set out to discover whether it had adversely affected her mice.

Describe the impact of deforestation of both abiotic and biotic factors within the tropical rainforest.

If a keystone species is removed from an ecosystem