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