phosphorus cycle
What will be an ideal response?
In nature, phosphorus exists as the phosphate ion (PO43-). Weathering of rocks and volcanic activity releases phosphate into the soil, water, and air, where it becomes available to terrestrial food webs. Phosphate enters the oceans in surface runoff, groundwater flow, and river flow. Phosphate dissolved in ocean water cycles into marine food webs. Some phosphate from the marine food webs falls to the ocean floor, where it forms sediment.
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The shaft of a long bone is also known as:
A. the diaphysis. B. the epiphysis. C. trabeculae. D. the long bone wall.
If liver cells had to store all of their energy in the form of glucose instead of glycogen, liver cells might:
What will be an ideal response?
The sea squirts and lancelets have an inner chamber that expels water. This chamber is called the
a. intestine. b. bladder. c. atrium. d. nephridium.
Provide at least two types of evidence that support the endosymbiont theory. What will be an ideal response?