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