Calcium, when written as Ca2+, represents _____.
A) molecular calcium
B) elemental calcium
C) calcium ion
D) a calcium free radical
E) one of the several calcium isotopes
Answer: C) calcium ion
Biology & Microbiology
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The cuticle of most insects is composed of:
A. structural proteins. B. pectin. C. chitin. D. waxy lipids.
Biology & Microbiology
Which trophic level would be best represented by a rabbit?
a. decomposer b. detritivore c. primary consumer d. primary producer e. secondary consumer
Biology & Microbiology
Refer to the accompanying figure. Which of these lungs would be best for an animal that is fairly active?
a. 1 b. 2 c. 3 d. 4 e. Any of these.
Biology & Microbiology
Select the phrases that apply to the sixth mass extinction.
A. human influenced B. Cretaceous period C. slow rebound of biodiversity D. asteroid
Biology & Microbiology