Cell division and Sexual Reproduction

Which of the following sequences represents the correct order of events in the formation of a human fetus?

• Zygote → Blastocyst → Embryo → Fertilization

• Fertilization → Zygote → Blastocyst → Embryo

• Blastocyst → Embryo → Differentiation → Zygote

• Fertilization → Growth → Differentiation → Zygote

The diagram below shows a fetus implanted in a female uterus
Fertilization of the egg most likely occurred in which of the following structures?

• A
• F
• C
• D

The drinking of alcoholic beverages by a pregnant woman is harmful to the development of her fetus. This is most damaging early in the first trimesters of pregnancy because during this time

• the lungs of the fetus become functional
• alcohol can easily enter the mouth of the fetus
• many of the essential organs of the fetus are forming.
• the fetus cannot excrete wastes.

Which of the following describes fertilization?

• Cell differentiation to form a blastula
• Formation of germ layers in a deuterostome
• A sperm joining an egg to form a zygote
• Sperm and egg production

Abnormalities present in the cells that line the uterus may prevent the production of offspring by directly interfering with which process?

• The development of the embryo.
• The differentiation of gametes into zygotes.
• The secretion of estrogen by the ovary.
• The production and release of egg cells.

Sperm are created through meiosis in an area of the testes called the seminiferous tubules. Through which structure do the sperm travel to exit the testes?

• vas deferens
• seminiferous tubules
• scrotum
• epididymis

Which of the following is true of a zygote?

• It forms into a blastocyst
• It is an unfertilized egg
• It produces haploid male gametophytes
• It is made up of only one cell

What is the human embryo called after the eighth week of development?

• a zygote
• an infant
• a fetus
• a morula

Which of the following events occurs during the first trimester?

• heart beat begins
• lungs fully developed
• bones become solid
• fetus moves, kicks and swallows

Below is a diagram of the male reproductive system.
Which structure is represented by the letter D?

• scrotum
• testes
• prostate gland
• epididymus