One major difference between ectomycorrhizae and arbuscular mycorrhizae is
A. ectomycorrhizae are parasitic on plant roots while arbuscular mycorrhizae are not.
B. ectomycorrhizae do not penetrate plant roots; arbuscular mycorrhizae penetrate plant roots.
C. ectomycorrhizae are more common on plant roots than arbuscular mycorrhizae.
D. ectomycorrhizae form mutualisms while arbuscular mycorrhizae are parasitic.
E. most ectomycorrhizae are zygomycetes while most endomycorrhizae are basidiomycetes.
B. ectomycorrhizae do not penetrate plant roots; arbuscular mycorrhizae penetrate plant roots.
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The sequence of amino acids in a protein is based on the ________ of the mRNA.
Fill in the blank(s) with the appropriate word(s).
Eukaryotic organisms speed up the process of DNA replication by
A. producing several sliding clamp complexes which provide more binding sites for DNA pol III. B. using multiple origins of replication on each chromosome. C. using DNA gyrase to unravel the double helix rather than DNA helicase. D. shortening the initiation phase.
In the early years of microbiology, microorganisms were referred to as ________
cooties animalcules zygotes prokaryotes
The flow of energy is one way, but nutrients in ecosystems ________.
Fill in the blank(s) with the appropriate word(s).