The nervous system is derived mainly from which embryonic cell layer in most eumetazoans?
a. mesoderm
b. epiderm
c. mesoglea
d. endoderm
e. ectoderm
E
Biology & Microbiology
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The ________ are of critical ecological importance because most are endomycorrhizal symbionts of vascular plants.
A. Zygomycota B. Basidiomycota C. Deuteromycota D. Glomeromycota
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What distribution pattern is the most common in the
natural world? a. random b. uniform c. clumped d. stratified or layered e. homogeneous
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Most of the world's food supply comes from
A) wild plants. B) only 12 plant crops. C) more than 100 rain-forest species. D) salt-tolerant crops. E) frost-resistant crops.
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Cyanobacteria are a type of
A) chemoautotroph. B) chemoheterotroph. C) photoautotroph. D) photoheterotroph.
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