Reproductive System

A fertilized egg undergoes several stages before it is successfully implanted. The diagram below shows these stages as the fertilized egg travels through the female reproductive system. In which of the following structures of the female human reproductive system is the blastocyst implanted during normal human 

• ovary
• uterus
• vagina
• amniotic sac

The drinking of alcoholic beverages by a pregnant woman is harmful to the development of her fetus. This is most damaging early in a 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.

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
• scrotoum
•  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

Tags

NGSS.MS-LS1-1

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

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

• scrotum
• testes
• prostrate gland
• epididymus

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

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

• zygote
• an infant
• a fetus
• a morula

Tags

NGSS.HS-LS1-4

For a human zygote to become an embryo, it must undergo

• fertilization
• recombination
• meiotic dvisions
• mitotic divisions

The diagram below represents a stage in the development of a fetus. A major function of structure X is to

• produce gametes by meiosis
• protect the fetus from physical injury
•  exchange materials between the mother and the fetus
• store food to provide the fetus with nutrients