Explanation: An example of positive feedback is milk production by a mother for her baby. A negative feedback loop is one way that the endocrine system tries to keep homeostasis (stability) in the body. If an endocrine gland senses that there is too much of one hormone in the body, it will initiate changes to decrease production of that hormone.
Answer:
750 to 1,250 cubic centimeters.
Explanation:
<em>Homo erectus </em>is also known as the upright man. There species were present in the Pleistocene era. Their first fossil was dated back at 1.8 million years ago.
The brain capacity of<em> Homo erectus </em>was found to be between the 750 and less than 1,250 cubic centimeters. Their species had been derived into<em> Homo heidelbergensis.</em>
Thus, the correct answer is option (D).
Answer:
The mitral valve has fewer flaps than the right atrioventricular valve:
<em>a) True </em>
Explanation:
The mitral valve is a bicuspid valve, which means it has two flaps; whereas, the right atrioventricular valve is a tricuspid valve and so has three flaps.
These two heart valves link the atrium with the ventricles. The mitral valve is located on the left side of the heart, while the tricuspid valve is on the right side.
