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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) C) and E)
G) A) and B)

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Mature human sperm cells:


A) Are spermatozoa
B) Are secondary spermatocytes
C) Contain 46 chromosomes
D) Are primary spermatocytes
E) Undergo meiosis

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

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In a secondary oocyte meiosis is arrested in metaphase II until:


A) Ovulation
B) FSH is present
C) Until fertilization occurs
D) Until LH is secreted by the anterior pituitary
E) Puberty

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

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In the male,the sac-like structure that contains the testes is the:


A) Epididymis
B) Vas deferens
C) Scrotum
D) Sustentacular cells
E) Seminal vesicle

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

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The structure that secretes a thin,milky,alkaline fluid that activates the sperm to swim is the:


A) Bulbo-urethral gland
B) Seminal vesicle
C) Prostate gland
D) Vas deferens
E) Epididymis

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

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The tightly coiled tube that receives and stores sperm from one testis is a(an) :


A) Scrotum
B) Vas deferens
C) Epididymis
D) Bulbo-urethral gland
E) Seminal vesicle

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

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Substances that cause birth defects are collectively called:


A) Androgens
B) Prostaglandins
C) Teratogens
D) Follicle stimulating hormones
E) None are correct

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

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In humans if a preembryo splits before day 12 of development ___________________ are usually formed.


A) Polar bodies
B) Secondary oocytes
C) Fraternal twins
D) Identical twins
E) Embryonic discs

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

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


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

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

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Taking antibiotics can disrupt the microbial community of the vagina and create an opportunity for the yeast Candida albicans to cause an infection.

A) True
B) False

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The structure that connects the embryo to the placenta is the:


A) Chorionic villus
B) Umbilical cord
C) Uterine tube
D) Fallopian tube
E) Embryonic disc

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

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A vasectomy is a surgical procedure in which the vas deferens are severed,and then tied.How would this cause sterility?


A) Sperm cannot be produced by meiosis
B) Sperm cannot be produced by mitosis
C) Sperm cannot move to the urethra
D) A man cannot get an erection
E) The testes stop producing testosterone

F) D) and E)
G) All of the above

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The tube-like structure that serves as the birth canal in the human female is the:


A) Cervix
B) Vulva
C) Vagina
D) Uterus
E) Uterine tube

F) A) and E)
G) A) and C)

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Cuttlefish have a closed circulatory system and live under water.Which of the following organs would they have?


A) A heart and gills
B) A heart and lungs
C) A heart
D) Lungs
E) Gills

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

Correct Answer

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A baby turtle growing into an adult that appears similar is an example of ____.


A) Direct development
B) External fertilization
C) Internal fertilization
D) Indirect development
E) Differentiation

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

Correct Answer

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The tightly coiled structure (structures) inside the testes that produce the sperm cells is (are) the:


A) Seminiferous tubules
B) Epididymis
C) Vas deferens
D) Interstitial cells
E) Bulbo-urethral glands

F) A) and D)
G) All of the above

Correct Answer

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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) C) and D)
G) A) and E)

Correct Answer

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In humans the transparent sac that contains fluid that cushions the embryo and maintains a constant temperature and pressure is the:


A) Amnion
B) Yolk sac
C) Embryonic disc
D) Chorionic villus
E) Chorion

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

Correct Answer

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Male cuttlefish competing to mate with a female supports which definition of natural selection best?


A) Survival of the fittest
B) Longevity of the fittest
C) Reproduction of the fittest
D) Reproduction of the largest
E) Survival of the largest

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

Correct Answer

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figure 34.25 figure 34.25   -What can be concluded from figure 34.25? A) Female impersonators were successful in mating 50% of the time B) Males who guard a female for 0-20 minutes had the most reproductive success C) Males who guard a female for more than 40 minutes had the most reproductive success D) There was no correlation between time spent guarding a female and reproductive success E) Males who guard a female for 20-40 minutes had the most reproductive success -What can be concluded from figure 34.25?


A) Female impersonators were successful in mating 50% of the time
B) Males who guard a female for 0-20 minutes had the most reproductive success
C) Males who guard a female for more than 40 minutes had the most reproductive success
D) There was no correlation between time spent guarding a female and reproductive success
E) Males who guard a female for 20-40 minutes had the most reproductive success

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

Correct Answer

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