Sponges have a bone-like support system of spicules that are made up of which of the following materials?
a. calcium and hydrogen
b. cellulose and silica
c. calcium carbonate or silica
d. chitin or calcium carbonate
c. calcium carbonate or silica
Biology & Microbiology
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If 100,000 units of energy are contained within the trees in the diagram above, ____ units of energy are stored within the ___.
A. 1,000; spiders
B. 10; humans
C. 100; fish
D. 1,000; frogs
Biology & Microbiology
The ________ consists of myelinated axons that conduct impulses over long distances
Fill in the blank(s) with correct word
Biology & Microbiology
You discover a single-celled organism that does not have a nucleus, and you also notice that the culture is producing methane. In which group would you place this organism?
A) Kingdom Protista B) Domain Bacteria C) Domain Archaea D) Domain Eukarya
Biology & Microbiology