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Ninth Grade (Grade 9) Human Reproduction Questions

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Grade 9 Human Reproduction
Identify the components of internal fertilization by checking them off in the list below.
  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 controls the start (onset) of puberty?
  1. Saliva Gland
  2. Thyroid Gland
  3. Pituitary Gland
  4. Adrenal Gland
Grade 9 Human Reproduction
Approximately how long does it take for childbirth to occur, from fertilization to birth?
  1. Approximately nine months
  2. Three trimesters
  3. Approximately 280 days
  4. All of the above
Grade 9 Human Reproduction
Where does fertilization tend to take place?
  1. In the cervix
  2. In the uterus
  3. In the epididymis
  4. In the fallopian tubes
Grade 9 Human Reproduction
When does conception or fertilization occur?
  1. A dominant gene overrides a recessive gene.
  2. Sperm from a male unites with an egg from a female.
  3. An egg matures in a female's ovary.
  4. All 23 pairs of chromosomes are present.
Grade 9 Human Reproduction
What is the vulva?
  1. Humans, animals, or plants.
  2. The external portions of the female genitalia
  3. The period between the infection of a person and the onset of symptoms
  4. Any large groups of sub-microscopic organisms
Grade 9 Human Reproduction
How are blood and nutrients carried from the mother to the developing fetus?
  1. By means of the placenta
  2. By means of the Fallopian tubes
  3. By means of the endometrium
  4. By means of the umbilical cord
Grade 9 Human Reproduction
What are the overall physical changes that occur in male and female bodies during puberty called?
  1. premenstrual symdrome.
  2. estrogen
  3. secondary sex characteristics
  4. testosterone
Grade 9 Human Reproduction
Grade 9 Human Reproduction
How many chromosomes do spermatogonia in humans have?
  1. 46 Chromosome
  2. 23 Chromosomes
  3. 2 Chromosomes
  4. 44 Chromosomes
Grade 9 Human Reproduction
Grade 9 Human Reproduction
What is fertilization?
  1. The joining of a sperm
  2. The joining of a sperm and egg cell
  3. The joining of an egg cell
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
Another name for identical twins is                .
  1. Chromosome
  2. Monogyzotic
  3. Dizyogotic
  4. Conception
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