What is biomass?a.organic matter from both living and non-living organismsb.organic matter from non-living organismsc.organic matter from living organismsd.inorganic matter from non-living organisms

What is the best definition for biomass?The average dry mass of a consumer at the top of a food chainThe average dry mass of a producer in a food chainThe dry mass of food consumed within a food chainThe dry mass of an organism, which equates to the amount of energy it contains2What do the arrows in a food chain show?The direction the energy travels inWhether organisms are primary or secondary consumersThe size of the organisms at each levelThe numbers of organisms at each level3Which of the following describes secondary consumers?They eat plantsThey eat meatThey are plants or algaeThey eat tertiary consumers4Which of the following statements about a pyramid of biomass is not true? The producer is always at the bottomThe amount of biomass at each level is more than it was at the previous levelIt is always shaped like a triangleIt shows the relative amount of biomass at each level of a food chain5A flock of sheep with a biomass of 300 kg feeds on grass with a biomass of 1000 kg. What is the efficiency of energy transfer in this food chain? 100%30%3%0.3%6The amounts of biomass in living things decrease as you progress up a food chain. Which of the following biomass will be transferred to the next trophic level?Biomass used for growth and repairBiomass used for respirationBiomass used for movementBiomass lost as waste

What is meant by the word "organic" in chemistry?Question 4Select one:a.living organismsb.real chemistryc.carbon-basedd.plants

The energy in biomass is used to make electricity. How is the energy stored in biomass?A.In chemical bondsB.As light energyC.In the nucleusD.As kinetic energy

Which is an environmental consequence of using biomass as a source of energy? A. There are no environmental consequences for using biomass as a source of energy. B. Biomass creates harmful emission of carbon and sulfur, and causes massive cutting of trees. C. Biomass has a great impact on the temperature of fresh water and the amount of dissolved oxygen.

Heterotrophs are:Question 9Select one:a.organisms that derive their carbon from organic sources.b.consumers that obtain energy from the chemical energy in thermal springs.c.organisms that live only off dead and decaying organic material.d.non-vascular plants.e.organisms that derive their carbon from inorganic sources.