Ques: Answer the following question given this paragraph: Chemoautotrophs are cells that break down inorganic molecules to supply energy for the cell, and use carbon dioxide as a carbon source. Chemoautotrophs include prokaryotes that break down hydrogen sulfide (H 2 S the "rotten egg" smelling gas), and ammonia (NH 4 ). Nitrosomonas , a species of soil bacterium, oxidizes NH 4 + to nitrite (NO 2 - ). This reaction releases energy that the bacteria use. Many chemoautotrophs also live in extreme environments such as deep sea vents. Q: What are the cells that break down inorganic molecules to supply energy for the cell, and use carbon dioxide as a carbon source? Choices: - staurikosaurus - fluctuations - Sediments - chemoautotrophs A:
Ans: chemoautotrophs

Ques: Answer the following question given this paragraph: The digestive system consists of organs that break down food, absorb nutrients, and eliminate waste. Q: What body system consists of organs that break down food, absorb nutrients, and eliminate waste? Choices: - lymphatic system - hormonal system - skeletal system - digestive system A:
Ans: digestive system

Ques: Answer the following question given this paragraph: Unlike the sponges which evolved prior to cnidarians, the cnidarians are made up of true tissues. The inside of a cnidarian is called the gastrovascular cavity , a large space that helps the organism digest and move nutrients around the body. The cnidarians also have nerve tissue organized into a net-like structure, known as a nerve-net, with connected nerve cells dispersed throughout the body. Cnidarians do not have true organs, however. Q: What is a large space that helps the organism digest & move nutrients around the cnidarian body? Choices: - thorax - abdominal wall - vacuole - gastrovascular cavity A:
Ans: gastrovascular cavity

Ques: Answer the following question given this paragraph: 6.2 Potential, Kinetic, Free, and Activation Energy Energy comes in many different forms. Objects in motion do physical work, and kinetic energy is the energy of objects in motion. Objects that are not in motion may have the potential to do work, and thus, have potential energy. Molecules also have potential energy because the breaking of molecular bonds has the potential to release energy. Living cells depend on the harvesting of potential energy from molecular bonds to perform work. Free energy is a measure of energy that is available to do work. The free energy of a system changes during energy transfers such as chemical reactions, and this change is referred to as G. The G of a reaction can be negative or positive, meaning that the reaction releases energy or consumes energy, respectively. A reaction with a negative G that gives off energy is called an exergonic reaction. One with a positive G that requires energy input is called an endergonic reaction. Exergonic reactions are said to be spontaneous, because their products have less energy than their reactants. The products of endergonic reactions have a higher energy state than the reactants, and so these are nonspontaneous reactions. However, all reactions (including spontaneous -G reactions) require an initial input of energy in order to reach the transition state, at which they'll proceed. This initial input of energy is called the activation energy. Q: What kind of energy is specifically defined as the energy that is available to do work? Choices: - used - new - old - free A:
Ans:
free