Answer:
Saliva's normal pH range is between 6.2 and 7.6. It's average is like a 6.7. Saliva keeps a neutral pH balance and doesn't fall below 6.3 in the oral cavity.
Explanation:
I hoped this helped a little bit.
"Disruptive selection" is the one mechanism among the choices given in the question that <span>brought this change in gene frequencies. The correct option among all the options that are given in the question is the fourth option or option "D". I hope that the answer has actually come to your help.</span>
Answer:
False.
Explanation:
Classification of organism is important to classify them in similar and different groups. Organisms can be classified on the basis of the development of the mouth or the anus first.
The organism in which mouth develops first by the opening of gastrula are called protostome not deuterostomes. Deuterostome develop anus first from the opening of gastrula.
Thus, the correct answer is option (b).
