The correct answer is A. Cephalic phase
Explanation:
In the digestive system and digestive process, there are different phases or stages. In the case of the cephalic phase, this is the first phase of the process and starts even before food enters in the organism, because fo this, the cephalic phase includes the anticipatory responses to food including salivation. This is the part or phase Pavlolv stimulated in his experiments because in this dogs salivated anticipating food and this was linked to the sound of a bell and that make dogs salivate even if there was no food.
Waves pull away in a srtright line because the the disturbance action of transferring energy is done without an outside influence and in the same medium as well
<h3>What is a wave?</h3>
A wave is defined as a disturbance which travels through a distance, transferring energy from one place to another
Some few types of waves are
- Electromagnetic waves
- Matter waves
- Mechanical waves
So therefore, waves pull away in a srtright line because the the disturbance action of transferring energy is done without an outside influence and in the same medium
Learn more about waves:
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Answer:
skin acts as a protective barrier, therefore it does not secrete hormones
Secondary succession is the ecological succession that occurs after the initial succession has been disrupted and some plants and animals still exist. It is usually faster than primary succession
