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