Viruses arent able to respond to stimuli when outside of a host cell because outside host cells, viruses are dormant and sometimes even considered dead. Only when a virus starts reproducing in a cell can it weakly respond to stimuli. :))
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Answer:
Heterotrophs
Explanation:
Autotrophs, producers, and plants all make their own food.
Answer:The characteristics of red blood cells is that they are usually concave in shape, and usually have a fair bit of surface area on them. Immature red blood cells like reticulocytes are more squashed like. The function of red blood cells is to carry oxygen, and/or carbon dioxide to various portions of the body.
Explanation:
