Suppose you are a botanist and you discover a plant that has a small free-living gametophyte that requires external water for fertilization and a large free-living sporophyte. The free-living sporophyte eventually releases spores from sporangia on the margins of its leaves. Into which group should you classify this plant?
a. gymnosperms
b. angiosperms
c. seedless vascular plants
d. bryophytes
Ans: c. seedless vascular plants
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Supercoiling of double-stranded DNA is called its ______________ structure
A. primary B. secondary C. tertiary D. quaternary E. duplex
Which number identifies the site where the transcriptional complex begins to form?
a. 1 b. 2 c. 3 d. 4 e. 5
. The substance that typically provides rigidity to fungal cell walls, and is found in some animals, is
____.
a. lignin b. cellulose c. starch d. collagen e. chitin
Pedigrees ____
a. are usually constructed using the phenotypic information of one generation b. cannot determine whether a trait has a dominant or recessive pattern c. use squares to represent females and circles to represent males on their diagrams d. are not useful in deducing the genotypes of parents e. provide information on the patterns of inheritance of a trait