Only 3 question 6. 100% of the energy that comes into an ecosystem comes in at the level of the which gets its energy from the sun to make its own food by photosynthesis. 7. energy in an ecosystem is lost at a rate of % per trophic level a. 10% b. 25% c. 50% d. 75% e. 90% 8. at which trophic level would you find the least # of organisms a. producer b. tertiary consumer c. secondary consumer

Answers are:

6. 100% of the energy that comes into an ecosystem comes in at the level of the producer which gets its energy from the sun to make its own food by photosynthesis.

7. Energy in an ecosystem is lost at a rate of 90% per trophic level. Only 10% gets transferred to the next level.

8. At tertiary consumer level there are least number of organisms present because very less energy is available to them from the preceding trophic levels.

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in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: