D, light can travel in the air or a vacuum and the speed is constant whether the light source is stationary or moving.
Answer:
Extraction of oil from tar sands is not economically feasible.
Explanation:
You may be referring to the cytoplasm here. That is the "filling" within the cell. But if you are looking for specific transport of proteins, the ER folds proteins and then transport vesicles move them to the Golgi.
Answer:
provide a large surface area of moist, selectively permeable membrane.
Explanation:
Delusions is a idiosyncratic belief or impression that is firmly maintained stating that they make false impressions on people
Some symptoms are irritable angry or a low mood also hallucinations
