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