Which statement about the megasporocyte is true?
a. It undergoes meiosis to produce three haploid cells.
b. It is a diploid cell located within an ovule.
c. It divides mitotically to form a male gametophyte.
d. It plays an important role in cross-pollination.
e. It will give rise to the generative cell.
b
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The structural diversity of carbon-based molecules is based upon which of the following properties?
A. the ability of carbon to form four covalent bonds B. the ability of those bonds to rotate freely C. the orientation of those bonds in the form of a tetrahedron D. None of these choices is correct. E. All of these choices are correct.
Which period was unusually dry, giving seed plants an evolutionary advantage over previously dominant seedless plants?
a. Pennsylvanian b. Mississippian c. Permian d. Devonian
Vampire squid are actually octopuses
Indicate whether the statement is true or false
Examples of "new" features, which include wings on insects, flowers on plants, and feathers on birds,
are referred to as: a. preadaptations. b. allometric growth. c. allopolyploidy. d. paedomorphosis. e. punctuated equilibrium.