How much energy is available at the third trophic level if the first trophic level has 300,000
kilocalories of available energy and the loss rate between trophic levels is 90 percent?
A. 300.000 kilocalories
B. 30,000 kilocalories
C. 3000 kilocalories
. 300 kilocalories

Which of the following describes the difference in stimuli required to detect a difference between the stimuli? a. just noticeableb. signal detectionc. subliminald. top down

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above

Which of the following matches the organisms described with the correct domain? a. archaea--multicellular, eukaryotic organisms that do not have cell walls b. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sources c. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycan d. bacteria--unicellular, eukaryotic organisms that always lack cell walls