Which of the following statements characterize heterospory?
_____ It involves production of two different types of spores from a single sporangium.
_____ It involves production of two different kinds of spores, one growing into male gametophytes and the other into female gametophytes.
_____ It increases the chance of cross-fertilization.
_____ It increases the potential for genetic variation and aids evolutionary flexibility.
_____ It occurs in seed plants and seedless vascular plants.
_____ It involves production of two different types of spores from a single sporangium.
__X__ It involves production of two different kinds of spores, one growing into male gametophytes and the other into female gametophytes.
__X__ It increases the chance of cross-fertilization.
__X__ It increases the potential for genetic variation and aids evolutionary flexibility.
_____ It occurs in seed plants and seedless vascular plants.
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A codon consists of 5 bases in a mRNA molecule
a. true b. false
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Answer the following statement true (T) or false (F)