In the fern life cycle, the generation is dominant.
a. haploid gametophyte
b. diploid gametophyte
c. haploid sporophyte
d. diploid sporophyte

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)

When a cell is in a solution that has the same concentration of water and solutes as its cytoplasm, the cell is said to be in a(n) solution. a. isotonic b. hypotonic c. hypertonic b. facilitated

Why are current extinctions of concern to enviromentalists?