How does a diaphragm prevent pregnancy select one of the options below as your
a. it releases spermicide into the uterus to keep sperm from fertilizing eggs.
b. it produces hormones that keep a woman's ovaries from releasing eggs.
c. it covers the penis to keep it from releasing sperm into the vagina.
d. it blocks the cervix in order to keep sperm from entering the uterus

The table below shows the number of foot bones in some horse fossils. horse fossil recordhorse fossil number of foot bonesp 19q 17r 24s 13ancient horses had more bones in their foot then present-day horses. the present-day horse has 11 foot bones. what is the correct order of evolution of the horse starting from the youngest fossil? a. q p r s b. s r p q c. s q p r d. r p q s

Ecology can best be described as the study of what

19. a cell is viewed under a microscope and is found to have two nuclear envelopes and spindles that appear to be breaking apart. which phase of mitosis is the cell most likely in? a. metaphase b. prophase c. telophase d. anaphase