The esophagus squeezes food down the digestive tract by an involuntary synchronized muscle movement called the Peristalsis
Answer: Platelets release a vasoconstricting substance called <u>SEROTONIN.</u>
Answer:
a gene is a unit of DNA that is usually located on a chromosome, they carry information that determine the traits, traits are characteristics inherited from your parents.
Explanation:
Answer:
The control group? (IDK)
Explanation: Isn't the control group the group that has all the factors that the experimental group has, except for the factor that's being changed?
I think the correct answer from the choices listed above is option B. Keratin is the protein in mammals which shows only a primary and secondary structure. Keratin is a fibrous protein forming the structural constituent of hair, feathers, hoofs, claws and many others.
