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Ninth Grade (Grade 9) Human Reproduction Questions

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Grade 9 Human Reproduction
The overall physical changes that occur in male and female bodies during puberty are called                              .
  1. adolescent syndrome
  2. premenstrual syndrome
  3. estrogen and testosterone
  4. secondary sex characteristics
Grade 9 Human Reproduction
When does conception, or fertilization, occur?
  1. An egg matures in a female's ovary.
  2. All 23 pairs of chromosomes are present.
  3. A dominant gene overrides a recessive gene.
  4. Sperm from a male unites with an egg from a female.
Grade 9 Human Reproduction
A zygote is a                             .
  1. two-celled embryo
  2. solid ball of about 50 cells
  3. blastocyst
  4. fertilized egg
Grade 9 Human Reproduction
What gland controls the start (onset) of puberty?
  1. adrenal
  2. pituitary
  3. salivary
  4. thyroid
Grade 9 Human Reproduction
For most females, ovulation occurs during menstruation.
  1. True
  2. False
Grade 9 Human Reproduction
Identify components of internal fertilization. Select all that apply.
  1. Female lays the eggs.
  2. Sperm cell enters the egg.
  3. The embryo develops through mitosis and cell division.
  4. A zygote is formed.
  5. They smoke a cigarette.
  6. Male deposits sperm inside the female's body.
Grade 9 Human Reproduction
What is the function of the placenta?
  1. mixing the blood of the mother and fetus
  2. protecting the fetus from any drugs or alcohol in the mother's body
  3. providing nutrients to the fetus
  4. cushioning and protecting the fetus
Grade 9 Human Reproduction
Approximately how long does it take for childbirth to occur, from fertilization to birth?
  1. nine months
  2. three trimesters
  3. 280 days
  4. all of the above
Grade 9 Human Reproduction
What is fertilization?
  1. joining of a sperm
  2. joining of a sperm and egg cell
  3. joining of an egg cell
Grade 9 Human Reproduction
The correct order of the reproductive anatomy of a female human from the outermost to the innermost structures is
  1. cervix, uterus, body of uterus, vagina, ovary.
  2. clitoris, vulva, vagina, cervix, uterus, oviduct, ovary.
  3. body of the uterus, uterine horn, ovary, oviduct, cervix.
  4. oviduct, ovary, cervix, uterus, vagina.
Grade 9 Human Reproduction
Another name for identical twins is                .
  1. chromosome
  2. monogyzotic
  3. dizyogotic
  4. conception
Grade 9 Human Reproduction
Menstrual cycles in humans are usually 28 days long.
  1. True
  2. False
Grade 9 Human Reproduction
How many chromosomes do human spermatogonia have?
  1. 2
  2. 23
  3. 44
  4. 46
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