The Fact That Canadian Teens Spend So Much Time with Others

question 28

Multiple Choice

The fact that Canadian teens spend so much time with others who are almost exactly the same age is the result of

• A)finding those who are younger childish and boring.
• B)not wanting to be bossed around by those who are older.
• C)significant amount of time in schools and organized teen sports.
• D)the influence of child labor laws.

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Definitions:

Teratogens

Agents that can cause malformations or defects in an embryo or fetus when a mother is exposed during pregnancy.

Blastocyst

A stage of early embryonic development characterized by a hollow, fluid-filled structure of cells, occurring before implantation in the uterine wall.

Placenta

A structure that forms within the uterus during pregnancy, which supplies the fetus with oxygen and nutrients, while also eliminating waste materials from the fetus's bloodstream.

Endoderm

The endoderm is one of the three primary germ layers in the very early embryo, which gives rise to the gastrointestinal tract, the liver, and the pancreas among other internal organs.