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