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