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