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Phytoplankton are said to release how much of the oxygen in Earth’s atmosphere?
chemosynthetic bacteria
worms
Plants make energy-rich food using sunlight.
50%
thermal energy
air
1,000 units
decreases
Which of the following steps is second in this food chain? a. The snake obtains energy by eating the mouse. b. Plants make energy-rich food using sunlight. c. The Sun emits energy. d. The hawk obtains energy by eating the snake.
chemosynthetic bacteria
worms
Plants make energy-rich food using sunlight.
50%
thermal energy
air
1,000 units
decreases
How is energy lost that is not used for life processes?
chemosynthetic bacteria
worms
Plants make energy-rich food using sunlight.
50%
thermal energy
air
1,000 units
decreases
If the first trophic level in an energy pyramid receives 10,000 units of energy from the Sun, how much energy is available for the second trophic level?
chemosynthetic bacteria
worms
Plants make energy-rich food using sunlight.
50%
thermal energy
air
1,000 units
decreases
Which of the following is a biotic factor?
chemosynthetic bacteria
worms
Plants make energy-rich food using sunlight.
50%
thermal energy
air
1,000 units
decreases
Which of the following items is abiotic?
chemosynthetic bacteria
worms
Plants make energy-rich food using sunlight.
50%
thermal energy
air
1,000 units
decreases
As you move upward, from level to level, in an energy pyramid, energy ____.
chemosynthetic bacteria
worms
Plants make energy-rich food using sunlight.
50%
thermal energy
air
1,000 units
decreases
Which of the following does NOT use light energy to make food?
chemosynthetic bacteria
worms
Plants make energy-rich food using sunlight.
50%
thermal energy
air
1,000 units
decreases
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