Which phrase best describes the usual form and function of a flowers sepal a. has a long slender stalk to make the pollen accessible b. is leaf-like and protects the developing flower c. is the tube-like pathway used by the pollen to reach the ovary d. is rounded and fuzzy to get pollen grains to stick to it

The trp operon in e.coli regulates genes that code for enzymes required for synthesis of the repressible operon. when tryptophan is not available amino acid tryptophan. the trp operon is a in the environment, the trp repressor protein activeinactiveregulated. therefore, rna polymerase can bind to the genes to begin transcription.

What volume of a 0.25 m solution can be made using 0.55 moles of ca(oh)2

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes