Multiple choice

Which of the following is/are the characteristic(s) of mammals?

  1. Homodont dentition
  2. Three auditory ossicles
  3. Four chambered heart
  4. Attached placenta

  1. Only 3

  2. Only 1 and 3

  3. Only 2, 3 and 4

  4. Only 2 and 4
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mammals have the following characteristics:

  1. Heterodont dentation (different kinds of teeth like incisors, molars, premolars and canines)
  2. Three auditory ossicles (malleus, incus and stapes)
  3. Four chambered heart (two auricles and two ventricles)
  4. Attached placenta (The placenta is attached to the wall of the uterus by blood vessels that supply the fetus with oxygen and nutrition and remove waste from it.)

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