A) eggs B) cilia C) estrogens D) sperm
A) cervix B) vagina C) uterus D) ovary
A) fertilization B) contraception C) menstruation D) birth
A) testes B) epididymis C) steroids D) ovaries
A) eggs B) estrogen C) testosterone D) sperm
A) vas deferens B) cowper's gland C) urethra D) epididymis
A) menstrual B) tri-weekly C) reproductive D) dizygomatic
A) menstruation B) ovarization C) fertilization D) ovulation
A) ovulation B) menestration C) menstruation D) ovarization
A) nuclei B) proteins C) ribosomes D) semen
A) one fast sperm B) one healthy sperm C) one super sperm D) one two-tailed sperm
A) zygote B) clone C) spermatic cell D) ovum
A) 48 B) 46 C) 23 D) 8
A) placenta B) vagina C) uterus D) umbilical cord
A) a lot B) sometimes C) rarely D) a little bit
A) vagina B) placenta C) umbilical cord D) uterus
A) uterus B) placenta C) oviduct D) vagina
A) sperm B) ovum C) clone D) embryo
A) sections B) steps C) stages D) processes
A) 9 steps B) 9 months C) 9 weeks D) 9 stages
A) humans B) pregnant women C) humanid D) mammalian
A) adulthood B) infancy C) adolescence D) childhood
A) Adolescence B) Childhood C) Adulthood D) Later Years
A) C → B → D → A B) A → B → C → D C) D → B → C → A D) B → A → C → D
A) 26 B) 48 C) 6 D) 12
A) uterus produces testosterone used in egg production B) testis produces nutrients for the offspring C) placenta allows nutrients to diffuse from the mother to the embryo D) ovary provides a place for the internal development of the embryo
A) The weather becomes wetter for a short period of time. B) Oak trees gradually become less common. C) The squirrel is exposed to radiation for several days. D) The squirrel stops using its claws for digging.
A) Their blood systems are separate and no materials are exchanged. B) Their blood systems are separate, but certain materials pass from one to the other. C) The blood flows directly from the mother into the fetus. D) Their blood systems are separate only at certain times in development and connected at other times.
A) genetic engineering B) meiotic cell division C) biotechnology D) asexual reproduction
A) scientists B) normal humans C) enslaved humans D) cloned humans
A) several sperm cells will unite with an egg so the fertilized egg will develop properly. B) enough sperm cells will be present to transport the egg from where it is produced to where it develops into a fetus. C) at least one sperm cell will be reached when the eggs swim toward the sperm cells in the ovary. D) some of the sperm cells will survive to reach the egg.
A) 1,250 per second B) 250 per second C) 1,000 per second D) 2,500 per second
A) testosterone B) estrogen C) insulin D) progesterone
A) fetus → tissues → zygote → egg B) zygote → tissues → organs → fetus C) sperm → zygote → organs → tissues D) zygote → sperm → tissues → egg
A) Mutations occur during development as a result of environmental conditions. B) Some cells develop before other cells. C) Developing cells may express different parts of their identical genetic instructions. D) All cells have different genetic material.
A) passive transport B) recombination of genes in gametes C) active transport D) synthesis of proteins
A) immunity B) evolution C) heredity D) differentiation
A) mitosis → fertilization → meiosis B) fertilization → meiosis → mitosis C) meiosis → fertilization → mitosis D) fertilization → mitosis → meiosis
A) testosterone and insulin B) estrogen and insulin C) progesterone and testosterone D) progesterone and estrogen
A) It synthesizes food for the embryo. B) It contains fluid that protects the embryo from harm. C) It allows blood of the mother to mix with the blood of the fetus. D) It removes waste products that are produced in the cells of the fetus. |