Answer:
the contractile unit of a muscle cell - <em>sarcomere</em>
contains calcium that is released during a contraction- <em>Sarcoplasmic reticulum</em>
composed of a contractile protein,actin, and two regulatory proteins, troponin and tropomyosin - <em>thin myofilament</em>
Is composed of the contractile protein myosin- <em>thick myofilament</em>
the muscle cell membrane- <em>Sarcolemma</em>
Answer: Might it be B? Either B or C.
Explanation: I would suggest B since developing country farmers suffer when other countries export cheap foods to them. This creates competition and can hurt the farmers’ source of income, essentially undercutting them. If it isn’t B, it has to be C since I got D wrong :)
<span>Answer:
Cellular respiration uses energy in glucose to make ATP. Aerobic (oxygen-using) respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport. ... During the Krebs cycle, pyruvate undergoes a series of reactions to produce two more molecules of ATP and also several molecules of NADH and FADH2.</span>
The hydrosphere includes water that is on the surface of the planet, unground, and in the air. Hydrosphere can be liquid, vapor, or ice.
Remember, Hydro means water or anything related to water.
Hope this helped :)
Have a great day
