A) eggs B) cilia C) estrogens D) sperm
A) uterus B) ovary C) vagina D) cervix
A) contraception B) birth C) fertilization D) menstruation
A) testes B) epididymis C) steroids D) ovaries
A) testosterone B) estrogen C) eggs D) sperm
A) epididymis B) cowper's gland C) vas deferens D) urethra
A) menstrual B) reproductive C) tri-weekly D) dizygomatic
A) fertilization B) ovulation C) menstruation D) ovarization
A) menestration B) menstruation C) ovarization D) ovulation
A) nuclei B) semen C) proteins D) ribosomes
A) one super sperm B) one two-tailed sperm C) one fast sperm D) one healthy sperm
A) ovum B) clone C) spermatic cell D) zygote
A) 48 B) 23 C) 46 D) 8
A) uterus B) vagina C) umbilical cord D) placenta
A) a lot B) sometimes C) a little bit D) rarely
A) uterus B) umbilical cord C) placenta D) vagina
A) vagina B) uterus C) placenta D) oviduct
A) sperm B) clone C) embryo D) ovum
A) processes B) sections C) steps D) stages
A) 9 months B) 9 weeks C) 9 stages D) 9 steps
A) mammalian B) humans C) humanid D) pregnant women
A) childhood B) adulthood C) infancy D) adolescence
A) Later Years B) Childhood C) Adulthood D) Adolescence
A) A → B → C → D B) B → A → C → D C) C → B → D → A D) D → B → C → A
A) 48 B) 12 C) 26 D) 6
A) testis produces nutrients for the offspring B) ovary provides a place for the internal development of the embryo C) placenta allows nutrients to diffuse from the mother to the embryo D) uterus produces testosterone used in egg production
A) The squirrel stops using its claws for digging. B) The squirrel is exposed to radiation for several days. C) Oak trees gradually become less common. D) The weather becomes wetter for a short period of time.
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) meiotic cell division B) asexual reproduction C) genetic engineering D) biotechnology
A) scientists B) normal humans C) cloned humans D) enslaved 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) some of the sperm cells will survive to reach the egg. D) at least one sperm cell will be reached when the eggs swim toward the sperm cells in the ovary.
A) 1,000 per second B) 1,250 per second C) 2,500 per second D) 250 per second
A) progesterone B) testosterone C) estrogen D) insulin
A) zygote → tissues → organs → fetus B) zygote → sperm → tissues → egg C) sperm → zygote → organs → tissues D) fetus → tissues → zygote → egg
A) Some cells develop before other cells. B) Mutations occur during development as a result of environmental conditions. C) All cells have different genetic material. D) Developing cells may express different parts of their identical genetic instructions.
A) recombination of genes in gametes B) active transport C) synthesis of proteins D) passive transport
A) immunity B) evolution C) heredity D) differentiation
A) mitosis → fertilization → meiosis B) meiosis → fertilization → mitosis C) fertilization → mitosis → meiosis D) fertilization → meiosis → mitosis
A) progesterone and estrogen B) testosterone and insulin C) estrogen and insulin D) progesterone and testosterone
A) It removes waste products that are produced in the cells of the fetus. B) It allows blood of the mother to mix with the blood of the fetus. C) It synthesizes food for the embryo. D) It contains fluid that protects the embryo from harm. |