SOLVED

31) Which of the following describes the fetal period? a. The period during which the zygote moves down to the uterus and begins to implant in the lining b. The period during which the major organs and structures of the organism first develop c. The period during which the umbilical cord develops d. The period during which tremendous growth occurs and the organs continue to develop and become functional 32) Tameeka is at a point in her pregnancy during which she is experiencing muscle contractions and movement and kicks. Which period of prenatal development is Tameeka currently experiencing? a. Blastocyst b. Embryonic c. Zygotic d. Fetal 33) At fertilization, the chromosomes from the father’s sperm unite with the chromosomes from the mother’s egg, creating a new cell called a(n) a. blastocyst. b. embryo. c. zygote. d. genome. 34) In the process of fertilization the ________ and _________ unite, resulting in a single cell. a. sperm; egg b. zygote; sperm c. embryo; zygote d. egg; fetus 35) Which of the following describes the embryonic period? a. The period during which the zygote moves down to the uterus and begins to implant in the lining b. The period during which the major organs and structures of the organism first develop c. The period during which the umbilical cord develops d. The period during which tremendous growth occurs and the organs continue to develop and become functional 36) Tara is at a point in her pregnancy during which the major organs and structures of her baby are first developing. Which period of prenatal development is Tara currently experiencing? a. Fetal b. Embryonic c. Placental d. Germinal 37) Emily and her husband are thrilled as they peer into Emily’s uterus by means of an ultrasound. The physician reports that the pregnancy appears normal, and that their baby’s fingers, toes, heart, and circulatory system are developing as expected. The couple learns that the baby is only 2 cm long. Given this information, the current stage of prenatal development is the a. fetal stage. b. embryonic stage. c. placental stage. d. germinal stage. 38) A fertilized cell is called a(n) ______________ when it consists of identical cells that have not begun to take on specific functions, and a(n) ______________ once the cells begin to differentiate and form bodily structures and organs. a. zygote; embryo b. blastocyst; fetus c. embryo; fetus d. blastocyst; embryo 39) At what point in a pregnancy has the heart begun to beat in the developing child? a. By 18 days after fertilization b. By the ninth week c. By the second trimester d. At the moment of birth 40) Which of the following terms is used to describe any substance, such as a drug, chemical, or virus that can bring about a birth defect? a. Teratogen b. Critical period c. Carcinogen d. Biohazard