One major difference between ectomycorrhizae and arbuscular mycorrhizae is
A. ectomycorrhizae are more common on plant roots than arbuscular mycorrhizae.
B. ectomycorrhizae do not penetrate plant roots; arbuscular mycorrhizae penetrate plant roots.
C. ectomycorrhizae are parasitic on plant roots while arbuscular mycorrhizae are not.
D. ectomycorrhizae form mutualisms while arbuscular mycorrhizae are parasitic.
E. most ectomycorrhizae are zygomycetes while most endomycorrhizae are basidiomycetes.
Answer: B
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1
b. 2
c. 3
d. 7
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