Answer: Solar rays from the sun that take 8 minutes to reach the earth
The correct option is B.
The information from the olfactory cells has to reach the cortex before they are transferred to the thalamus. When an odor molecule binds to a receptor, it start an electrical signal, which travel from the sensory neuron to the olfactory bulb. The olfactory bulb relays the signal to the appropriate part of the brain for further processing.
Respiration is done aerobically, using oxygen. a similar process is fermentation, yet it is done anaerobically, without oxygen. Fermentation, as a bi product, produces ethyl alcohol.
Answer: D. Bacterium
Explanation: prokaryotic cells make up the organisms found in the two kingdoms of life, Bacteria & Archaea