True or False. Biology!?

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1) The lowest trophic level of any ecosystem is occupied by the producers.
2)The number of organisms in a trophic level is always directly proportional to the amount of energy in that level
3)An energy pyramid shows the trophic levels as blocks stacked on one another.
4)An energy pyramid shows how much energy is transferred from one organism to the next
5)Energy pyramids are not related to food chains at all.
6)Biomass pyramids have little use when determining how much energy is in an ecosystem.
7)Only 10% of the biomass is available to organisms at the next higher trophic level.
8)There is more energy at the top of the energy pyramid than the bottom.
9)An example of a carnivore is a cow.
10)Biomass is the amount of organic matter found in an area

 

[Alexis L]

1) True. They start the food chains.
2) Some organisms of the same species may have a larger energy intake based on various circumstances, like size and age.
3) True.
4) True.
5) False. They are, if not how do you determine the organisms that consume the amount of energy,
6) False. Usually the organisms with the larger biomass have more energy, because you have to start with an organism that have the most energy so as to provide for the rest of the organisms in the higher tropic levels, given that some of this energy may be lost as heat, excretion, respiration and undigested matter,
7) False.(not so sure on this)
8) False. More energy at the bottom(refer to (6)
9) No. Cow is an herbivore. One example of a carnivore is lion.
10) No. Biomass refers to the weight of the organism in terms of kilocalories of energy. Urea comprises only a small percentage of our bodies only, since they are formed from the deamination of excess amino acids(building blocks of proteins).