Arbuscular mycorrhizae are characterized by all of the following features, except which one?
A. Fungal hyphae penetrate plant root cells.
B. They are the most common mycorrhizal type.
C. The fungal component is a glomeromycete.
D. The fungus can associate with several species of plants.
E. They are seen in the earliest vascular plant fossils.
Answer: D
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Unique features of the planctomycetes include ________.
A. a membrane-bound nuclear region B. resistance to ionizing radiation C. their size: some are as large as protozoa D. twitching fimbriae that are required for motility
In plants, the secondary metabolites are primarily responsible for
a. nutrition. b. food gathering. c. overcoming air pollutants. d. defense. e. protection against ultraviolet radiation.
Natural selection should favor plants producing small seeds in wet environments and plants that produce larger seeds in dry environments
Indicate whether the statement is true or false
What is a major difference in the genomes of virus/bacteria vs. plants/animals?
A. The genomes of viruses/bacteria have great genetic diversity; those of plants/animals are simpler and less diverse B. The genomes of viruses/bacteria consist almost or entirely of coding sequences; in those of plants/animals most DNA is non-protein coding C. The genomes of viruses/bacteria are typically large; those of plants/animals are smaller