Q 01/05

How many teeth make up a full set of baby teeth?

A) 20

B) 24

C) 28

D) 32

Answer · why

A) 20

Five per quadrant, ten per jaw; adults end up with 32.

Q 02/05

Which of a baby's first set of teeth usually erupt first?

A) Upper first molars

B) Lower front incisors

C) Upper front incisors

D) Lower canines

Answer · why

B) Lower front incisors

They typically appear between 6 and 10 months; the upper second molars come last.

Q 03/05

Which of these animals does NOT get just one set of baby teeth followed by adult teeth?

A) Goat

B) Deer

C) Elephant

D) Lion

Answer · why

C) Elephant

Elephants, kangaroos and manatees are polyphyodonts, replacing teeth throughout life.

Q 04/05

Around what age does teething typically begin?

A) Twelve months

B) Eighteen months

C) Two months

D) Six months

Answer · why

D) Six months

It continues, on and off, until roughly two and a half years.

Q 05/05

Do erupting teeth actually cut through a baby's gums?

A) Only the molars do

B) No, gum cells die and separate

C) Only if the baby chews

D) Yes, like a blade

Answer · why

B) No, gum cells die and separate

Hormones make cells in the gum die off so the tooth can pass through.

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