What system are we talking about? Context is needed... water cycle, cells, etc?
Answer:
c
Explanation:
because if it is constant that mean it has the same forward and backward force.
Streak isn't a category for the luster of the minerals.
<h3><u>Explanation</u>:</h3>
Luster is the property of a metal which marks the shiny and bright property of the metals. The elements are divided into two categories based on their shining property.
One class is very shiny and light can undergo direct reflection from its surface. They are the lustrous substances, mostly metals. They are said to have metallic luster.
The other group has the gross, greasy, waxy, pearly appearance which dont have any shiny property. They are said to have non metallic or submetallic luster.
Answer: The hair root is deep in the dermis at the hair bulb, and includes a layer of mitotically active basal cells called the hair matrix. The hair bulb surrounds the hair papilla, which is made of connective tissue and contains blood capillaries and nerve endings from the dermis
Explanation: