Answer the following question given this paragraph: The different feeding positions in a food chain or web are called trophic levels. Generally, there are no more than four trophic levels because energy and biomass decrease from lower to higher levels. Q: What are the different feeding positions in a food chain or web called? Choices: - neural levels - Primary Level - convoluted levels - trophic levels A:
trophic levels
(Question)
Answer the following question given this paragraph: Regardless of whether reactions are exothermic reactions or endothermic reactions , they all need energy to get started. This energy is called activation energy . Activation energy is like the push you need to start moving down a slide. The push gives you enough energy to start moving. Once you start, you keep moving without being pushed again. Activation energy is defined as the energy that must be overcome in order for a chemical reaction to occur, or the minimum energy required to start a chemical reaction. The concept of activation energy is illustrated in Figure below . Q: What do you call the energy that must be overcome in order for a chemical reaction to occur, or the minimum energy required to start a chemical reaction? Choices: - expression energy - phase energy - kinetic energy - activation energy A:
(Answer)
activation energy
Ques: Answer the following question given this paragraph: 6O 2 + C 6 H 12 O 6 6CO 2 + 6H 2 O Photosynthesis produces oxygen as a byproduct, and respiration produces carbon dioxide as a byproduct. In nature, there is no such thing as waste. Every single atom of matter is conserved, recycling indefinitely. Substances change form or move from one type of molecule to another, but never disappear (Figure 5.18). CO2 is no more a form of waste produced by respiration than oxygen is a waste product of photosynthesis. Both are byproducts of reactions that move on to other reactions. Photosynthesis absorbs energy to build carbohydrates in chloroplasts, and aerobic cellular respiration releases energy by using oxygen to break down carbohydrates. Both organelles use electron transport chains to generate the energy necessary to drive other reactions. Photosynthesis and cellular respiration function in a biological cycle, allowing organisms to access life-sustaining energy that originates millions of miles away in a star. Q: Photosynthesis produces oxygen as a byproduct, and respiration produces what as a byproduct? Choices: - carbon monoxide - nitrogen - ozone - carbon dioxide A:
Ans: carbon dioxide
(Q).
Answer the following question given this paragraph: Biomass is the material that comes from plants and animals that were recently living. Biomass can be burned directly. This happens when you burn a log in your fireplace. For as long as humans have had fire, people have used biomass for heating and cooking. Q: What is the organic material that comes from plants and animals that were recently living called? Choices: - biofuels - contaminants - chlorophyll - biomass A:
(A).
biomass
Ques:Answer the following question given this paragraph: Q: What is it in bone marrow transplants that may cause a graft versus host reaction? Choices: - tumors - neutrophils - cancer - lymphocytes A:

Ans:lymphocytes
Question: Answer the following question given this paragraph: Regional metamorphism occurs over a large area when a rock is buried or compressed. Q: What occurs over a large area when a rock is buried or compressed? Choices: - metamorphic diffusion - cavern system - landslide - regional metamorphism A:
Answer:
regional metamorphism