In guard cell opening which ion flows into the guard cell causing water to also flow in? K+
Na+
H+
CI-

Liquid water turns into water vapor at which step in the water cycle

16. which of the following accurately describes a step within transcription? a. dna polymerase uses one strand of rna as a template to put together nucleotides. b. the dna strand is used as a template for which a complementary rna strand can be produced. c. the rna strand forms a template by which dna can be built. d. the rna strand is produced within the cytoplasm.

Why are current extinctions of concern to enviromentalists?