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The correct sequence for the stages in development from conception to birth is


A) preembryonic stage, zygote, embryonic stage, fetal stage.
B) fetal stage, zygote, preembryonic stage, embryonic stage.
C) preembryonic stage, embryonic stage, zygote, fetal stage.
D) zygote, preembryonic stage, embryonic stage, fetal stage.
E) fetal stage, embryonic stage, preembryonic stage, zygote.

F) B) and D)
G) None of the above

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Birth control pills contain a combination of estrogen and progesterone.What effect would this have on the hypothalamus?


A) It would secrete less FSH and LH.
B) It would secrete more gonadotrophin-releasing hormone.
C) It would secrete more FSH and LH.
D) It would secrete less gonadotrophin-releasing hormone.
E) There would be no effect on the hypothalamus.

F) A) and E)
G) A) and D)

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If a woman,late in pregnancy,feels contractions of a muscular sac-like organ,she is feeling contractions of herΒ 


A) ovary.
B) labia majora.
C) vagina.
D) uterus.
E) vulva.

F) B) and E)
G) A) and D)

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If working on a diagram of the human male reproductive system,you would label the tightly coiled tube that receives and stores sperm from one testis as the


A) scrotum.
B) vas deferens.
C) epididymis.
D) prostate gland.
E) seminal vesicle.

F) C) and D)
G) B) and E)

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Working with a female patient who has ________ cancer,you expect that tests will show an infection with human papillomavirus.


A) ovarian
B) lung
C) breast
D) cervical
E) All answers are correct.

F) B) and C)
G) All of the above

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A female chicken laying a fertilized egg has undergone ________ with a rooster.


A) differentiation
B) external fertilization
C) indirect development
D) direct development
E) internal fertilization

F) B) and C)
G) A) and B)

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The stage of human development that occurs from implantation to about eight weeks after fertilization is the


A) zygote.
B) preembryonic stage.
C) gastrula.
D) fetal stage.
E) embryonic stage.

F) D) and E)
G) B) and C)

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The stage of human development in which the endoderm,mesoderm,and ectoderm form is the


A) zygote.
B) gastrula.
C) embryonic stage.
D) ovum.
E) fetal stage.

F) C) and E)
G) B) and D)

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A caterpillar turning into a butterfly is an example of


A) external fertilization.
B) internal fertilization.
C) indirect development.
D) direct development.
E) reproduction.

F) A) and E)
G) A) and D)

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Fruit fly development clearly exemplifies direct development,since the worm-like larva is so unlike the adult fly.

A) True
B) False

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