A food chain contains four trophic levels. The top-most level contains about 300 J of biomass. How much biomass (in J) do you expect to find in the bottom (i. e. primary producer) trophic level? Group of answer choices

30,000

3,000,000

300,000

300

30

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What goes in and out of a cell respiration?

1. you serve a volleyball with a mass of 2.1 kg. the ball leaves your hand with a speed of 30 m/s. the ball has energy. calculate it. 2. a baby carriage is sitting at the top of a hill that is 21 m high. the carriage with the baby weighs 12 n. the carriage has energy. calculate it. 3. a car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. the car has . calculate it.