All ecosystems need energy. What is the originating source for most of the energy that powers ecosystems on this planet?
A. Potential energy
B. Geothermal energy
C. Solar energy
D. Wind energy
Answer: C
You might also like to view...
The C4 photosynthetic cycle is more efficient than the C3 cycle when the ________
a. climate is hot and dry b. soil is deficient in nitrogen c. climate is cool and damp d. plant is growing at a high altitude
A solution with a pH of 9 has ____ times fewer hydrogen ions than a solution with a pH of 6
a. two b. four c. 10 d. 100 e. 1,000
Which of the following atoms is most likely to participate in an ionic bond?
A.) carbon, with an outer electron shell filled with four of a possible eight electrons B.) chlorine, with an outer electron shell filled with seven of a possible eight electrons C.) phosphorus, with an outer electron shell filled with five of a possible eight electrons
When the body wants to prolong or inhibit the transmission of an impulse from one neuron to the next, it often employs
A. voltage end-gates. B. neuromodulators. C. electrical connections. D. the electron transport chain.