C. Although Alpha Centauri B is similar in size to the sun, it is much further away from earth. The sun is 8 minutes away from earth at the speed of light, while Alpha Centauri B and earth is more than 4 light years apart.
Explanation:
This shows movement of a plant. Plant movement due to external stimuli are of two types: tropism and nasties. When the direction of external stimulus decides the direction of response in the form of growth it is called tropism. Thus, tropism is the directional growth movement of a plant part.
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Answer:
the olfactory epithelium
Explanation:
There are several protective features of the respiratory system which is responsible for stopping the less aggressive pathogens. Some of these protective features are:
Hairs in nose which trap pathogens like bacteria, virus from entering the lungs. The respiratory tract has mucus which is responsible for trapping the microbes and mucus have IgA antibodies which helps in eliminating these microbes. Alveolar macrophages engulf the pathogen and digest them
Olfactory is not a protective feature of the respiratory system and is responsible and adapted to detect the odor and transfer this signal to the brain.
