In horsetails, lycophytes, and whisk ferns, ____
a. spores give rise to gametophytes
b. the main plant body is a gametophyte
c. the sporophyte bears sperm- and egg-producing organs
d. the gametophyte is the dominant stage in the life cycle
e. the gametophyte produces spores
ANSWER: a
You might also like to view...
Population geneticists are interested in the forces that change the ____________________ of genes in a population. Fill in the blank(s) with the appropriate word(s)
In the section "Investigating Life: Birds Do, Bees Do It", how did the researchers alter the colors of M. lewisii and M. cardinalis?
A. by looking for naturally occurring color variants of M. lewisii and M. cardinalis in the wild B. by creating transgenic flowers with the desired color C. by deleting the YUP locus D. by duplicating the YUP locus E. by selectively breeding M. lewisii and M. cardinalis, yielding hybrid colors similar to the other species
If a population of 1000 individuals has 160 aa genotypes, assuming simple dominance by the A allele,
the phenotype frequency of the dominant phenotype is: a. 0.08. b. 0.16. c. 0.42. d. 0.84. e. 1.0
Which biome has the greatest number of distinct layers of vegetation?
a. savanna b. tropical rain forest c. desert d. chaparral e. grassland