Answer: True
Randomization is a process in which a subject or experimental unit is chosen at random without giving priority to desired characteristics required in an experimentation process. This results in non manipulated and unbiased data obtained after experimentation process.
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Answer:</h3>
Vertebrates have backbones, while invertebrates do not.
Humans, for example, are vertebrates because we have backbones.
Answer:
Once you begin swallowing, the process becomes automatic. Your brain signals the muscles of the esophagus and peristalsis begins. Lower esophageal sphincter. When food reaches the end of your esophagus, a ringlike muscle—called the lower esophageal sphincter —relaxes and lets food pass into your stomach.
