Which statement describes an example of the control of gene expression? A Three types of RNA are made in the nucleus during the process of transcription.
B New polypeptides are made using amino acids brought to ribosomes by tRNA
molecules.
C Certain coding segments of mRNA are assembled after non-coding segments are
removed.
D RNA polymerase matches RNA nucleotide bases to the DNA bases of the coding
strand.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.

a. to encourage apoptosis

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.