Enamel like scales on primitive fish (lungfish and coelocanths)
A) placoid
B) ctenoid
C) plasmoid
D) cosmoid
Ans: D) cosmoid
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What best describes the location where sexual spores form in club fungi?
a. in gills of the mushroom b. in club-shaped cells at the gill margin c. in fruiting bodies d. in club-shaped cells of mycelium e. in hyphae of an embryonic mushroom
Carnivorous plants like Sarracenia purpurea are which of the following?
A. detritivores B. producers and consumers C. producers D. consumers E. producers and detritivores
Which one of the following statements describes the process through which a primary RNA transcript becomes a functional mRNA?
A) Sections of the primary transcript called exons are removed, and the sections that remain are spliced together. B) Sections of RNA called exons are added to the primary transcript. C) A primary transcript needs no editing and is immediately ready to function as mRNA. D) Noncoding sections of the primary transcript, called introns, are removed, and the remaining coding sections, called exons, are spliced together. E) Random sections of the primary transcript called exons are replaced with sections called introns.
In flowering plants, how many sperm cells are typically produced from each microspore mother cell?
a. one b. two c. three d. four e. eight