Calcitonin, secreted from the thyroid, and parathyroid hormone. Calcitonin lowers the blood calcium levels, PTH increases it.
Answer: Human population, now over 7 billion, cannot continue to grow indefinitely. There are limits to the life-sustaining resources earth can provide us.
Explanation:
<span> Serratia marcescens primarily produces a bright red pigment called prodigiosin. Depending on the synthesis (partial or complete) of prodigiosin, the colour of the colony can be different. At the room temperature, prodigiosin production decrease which results in the white colour of Serratia. Serratia can also be colourless due to prolonged sunlight (UV mutagenesis).</span>
C.) Phisical Change - all substances stay the same
