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