Answer the following question given this paragraph: The stored chemical energy in organic matter or wastes is called biomass energy. The organic matter may be trees or other plants, or it may be wastes from homes and industries. When biomass is burned, it produces thermal energy that can be used for heating homes, cooking, or generating electricity. Biomassespecially woodis an important energy source in the poorer nations where most people can't afford fossil fuels. However, burning biomass releases air pollution and contributes to global climate change. Biomass can be used to make ethanol, a fuel that is added to gasoline. Although ethanol releases less pollution than gasoline, large areas of land are needed to grow the plants needed to make it (see Figure below ). This reduces the amount of land available for food production. Q: What is the term that refers to stored chemical energy in organic matter or wastes? Choices: - nuclear energy - potential energy - starch energy - biomass energy A:
biomass energy
Answer the following question given this paragraph: Nitrogen dioxide is a toxic gas with a sharp odor. It can irritate the eyes and throat and trigger asthma attacks. It is a major air pollutant. Q: What common air pollutant is characterized by its sharp odor and often triggers asthma attacks? Choices: - plant dioxide - pigment dioxide - Carbon Dioxide - nitrogen dioxide A:
nitrogen dioxide
Q: Answer the following question given this paragraph: A chemical reaction is a process that changes some chemical substances into other chemical substances. The substances that start a chemical reaction are called reactants . The substances that form as a result of a chemical reaction are called products . During the reaction, the reactants are used up to create the products. For example, when methane burns in oxygen, it releases carbon dioxide and water. In this reaction, the reactants are methane (CH 4 ) and oxygen (O 2 ), and the products are carbon dioxide (CO 2 ) and water (H 2 O). Q: What is a process that changes some chemical substances into other chemical substances? Choices: - a bio reaction - spontaneous mutation - cellular respiration - a chemical reaction A:
A: a chemical reaction
Question: Answer the following question given this paragraph: The mouth is the first digestive organ that food enters. The sight, smell, or taste of food stimulates the release of digestive enzymes by salivary glands inside the mouth. The major salivary enzyme is amylase. It begins the chemical digestion of carbohydrates by breaking down starch into sugar. Q: The major salivary enzyme is called? Choices: - synthase - mucosa - sucrase - amylase A:
Answer: amylase
*Question*
Answer the following question given this paragraph: The interior space that surrounds the thylakoids is filled with a fluid called stroma . This is where carbon dioxide is used to produce glucose, the second part of photosynthesis. Q: Fluid-filled thylakoids are the site of glucose production in the second stage of what process? Choices: - measurements - glycolysis - birth - photosynthesis A:
**Answer**
photosynthesis
(Q).
Answer the following question given this paragraph: For natural selection to take place, organisms must vary in their traits. Asexual reproduction results in offspring that are all the same. They are also identical to the parent cell. So how can prokaryotes increase genetic variation? They can exchange plasmids. This is called genetic transfer . It may happen by direct contact between cells. Or a "bridge" may form between cells. Genetic transfer mixes the genes of different cells. It creates new combinations of alleles. Q: What is the exchange of plasmids by prokaryotes called? Choices: - biochemical transfer - artificial transfer - transcription - genetic transfer A:
(A).
genetic transfer