Some microorganisms, such as yeast, produce energy in oxygen-free environments through the process of a. mitosis. b. photosynthesis. c. aerobic respiration. d. anaerobic respiration.

D. anaerobic respiration. Yeast produces energy in an environment without oxygen through the process of fermentation, an example of anaerobic respiration. The word anaerobic means "living without air". Yeast produces ethanol and carbon dioxide from glucose through anaerobic respiration.

Twenty one miles per hour

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.