Answer: organic
Explanation: Its melting point is -44 °C
Euglenas are heterotrophic.
Hererophic (must consume food) and autotrophic (can make its own food).
Answer:
The blood vessel from lungs to heart is pulmonary vein which carries oxygenated blood.
Why temperature affects heart rate in ectothermic organisms? If the temperature is within the optimal range for enzyme activity more ATP will be produced and the heart will beat faster due to increased metabolic activity and energy availability.
