Which of the following characteristics is common to all vascular plants that exhibit an alternation of generations in their life cycle?

A. large, independent gametophytes
B. multicellular sporophytes
C. Fertilization in water
D. diploid spores
E. Seed production


Ans: B. multicellular sporophytes

Biology & Microbiology

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Indicate whether the statement is true or false

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Analysis of the small subunit rRNAs from all organisms in the three current domains suggests that 

A. all modern and extinct organisms on earth arose from a common ancestor. B. the eukaryotes arose from prokaryotes. C. the Archaea are more closely related to bacteria than eukaryotes. D. the prokarytoes, archaea, and eukaryotes are not related.

Biology & Microbiology

Which of the following is in order from most inclusive to least inclusive?

A) kingdom, phylum, order, class, family, genus, species, domain B) domain, kingdom, phylum, class, order, family, species, genus C) kingdom, domain, class, phylum, family, order, genus, species D) domain, kingdom, phylum, class, order, family, genus, species

Biology & Microbiology

Which of the following structures decreases diffusion distances for oxygen and carbon dioxide by delivering air directly to body cells?

A) Spiracles B) Gill filaments C) Parabronchi D) Bronchi E) Tracheoles

Biology & Microbiology