Which of the following is true about Depo-Provera (DMPA)?

A. It works by stopping ovulation and thickening the cervical mucus.
B. It is used to prevent pregnancy for a period of 24 weeks.
C. It is a good birth control method for those desiring an immediate pregnancy.
D. It regularizes menstrual cycles and controls irregular bleeding.

Option A.

It works by stopping ovulation and thickening the cervical mucus.

Explanation:

Depo provera (medroxyprogesterone acetate) is a contraceptive injection that contain the hormones progestin which is used as a birth control. It stops the woman from getting pregnant by stopping ovulation and causing thickening of cervical mucus. It is an injection given every three months, it is safe and convinient for birth control.

It has some disadvantages and these include, it can cause irregular periods, it does not prevent against sexually transmitted disease, it should be stop several months before you can get pregnant e.t.c.

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.