What is true about the relationship between cells and the organisms they are part of? a. cells make up the basic structure of an organism, and they perform basic life functions for the organisms. b. cells make up the basic structure of an organism, but they do not perform basic life functions for the organisms. c. cells perform basic life functions for the organisms, but they do not make up the basic life structure of an organism. d. cells do not make up the basic structure of an organism, and they do not perform basic life functions for the organisms.

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)