Which statement is true of Glomeromycota?
a. They have DNA suggesting a polyphyletic lineage.
b. They were the earliest fungi to reproduce sexually.
c. They cannot exist without the presence of tree roots.
d. They taste delicious in many popular types of cheese.
c. They cannot exist without the presence of tree roots.
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A cell that is observed under the microscope is found to have its DNA enclosed in a nucleus, and has
other specialized internal compartments. The cell is a(n) ____.
a. prokaryote b. bacterium c. eukaryote d. E. coli e. P. aureus
Why is carbon dioxide considered to be one of the most important of the greenhouse gases?
A. It cycles through the carbon cycle, driving all life on earth. B. It is able to reflect infrared energy, preventing earth from heating up too much. C. It absorbs other gases, preventing them from becoming greenhouse gases also. D. It is able to absorb infrared energy, allowing earth to be warm enough to support life.
The kidneys can reabsorb nutrients and make _________ , a molecule that promotes calcium absorption in the digestive tract.
Fill in the blank(s) with the appropriate word(s).
Daily and seasonal fluctuations in temperature, salinity, and dissolved gases are most extreme in
A) the intertidal zone. B) sandy beaches. C) the estuary. D) the open ocean.