Problem: Nonvascular land plants are embryophytes that lack the vascular tissues xylem and phloem. They include mosses, liverworts and hornworts. Pteridophytic vascular plants with true xylem and phloem that reproduced by spores germinating into free-living gametophytes evolved during the Silurian period and diversified into several lineages during the late Silurian and early Devonian. Representatives of the lycopods have survived to the present day. By the end of the Devonian period, several groups, including the lycopods, sphenophylls and progymnosperms, had independently evolved "megaspory" – their spores were of two distinct sizes, larger megaspores and smaller microspores. Their reduced gametophytes developed from megaspores retained within the spore-producing organs (megasporangia) of the sporophyte, a condition known as endospory. Seeds consist of an endosporic megasporangium surrounded by one or two sheathing layers (integuments). The young sporophyte develops within the seed, which on germination splits to release it. The earliest known seed plants date from the latest Devonian Famennian stage. Following the evolution of the seed habit, seed plants diversified, giving rise to a number of now-extinct groups, including seed ferns, as well as the modern gymnosperms and angiosperms. Gymnosperms produce "naked seeds" not fully enclosed in an ovary; modern representatives include conifers, cycads, Ginkgo, and Gnetales. Angiosperms produce seeds enclosed in a structure such as a carpel or an ovary. Ongoing research on the molecular phylogenetics of living plants appears to show that the angiosperms are a sister clade to the gymnosperms.
What makes mosses different from other land plants?
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Answer: lack the vascular tissues


Problem: Although Whig grandees such as Portland and Fitzwilliam privately agreed with Burke's Appeal, they wished he had used more moderate language. Fitzwilliam saw the Appeal as containing "the doctrines I have sworn by, long and long since". Francis Basset, a backbench Whig MP, wrote to Burke: "...though for reasons which I will not now detail I did not then deliver my sentiments, I most perfectly differ from Mr. Fox & from the great Body of opposition on the French Revolution". Burke sent a copy of the Appeal to the king and the king requested a friend to communicate to Burke that he had read it "with great Satisfaction". Burke wrote of its reception: "Not one word from one of our party. They are secretly galled. They agree with me to a title; but they dare not speak out for fear of hurting Fox. ... They leave me to myself; they see that I can do myself justice". Charles Burney viewed it as "a most admirable book—the best & most useful on political subjects that I have ever seen" but believed the differences in the Whig Party between Burke and Fox should not be aired publicly.
How did Burke think the Whigs secretly felt?
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Answer: galled


Problem: where a single prime denotes the real part and a double prime the imaginary part, Z(ω) is the complex impedance with the dielectric present, Ccmplx(ω) is the so-called complex capacitance with the dielectric present, and C0 is the capacitance without the dielectric. (Measurement "without the dielectric" in principle means measurement in free space, an unattainable goal inasmuch as even the quantum vacuum is predicted to exhibit nonideal behavior, such as dichroism. For practical purposes, when measurement errors are taken into account, often a measurement in terrestrial vacuum, or simply a calculation of C0, is sufficiently accurate.)
Under what condition is the approximation C0 sufficiently accurate for calculation purposes?
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Answer:
in terrestrial vacuum