Which of the Following Is True of Children with Down

question 28

Multiple Choice

Which of the following is true of children with Down syndrome?

• A) Most cannot learn to read or write.
• B) They typically are blind in addition to their intellectual deficit.
• C) They have an unusually good auditory memory.
• D) They have difficulty expressing their thoughts and needs clearly in speech.

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Definitions:

Tetrapod

A tetrapod is a vertebrate with four limbs (or, like snakes, descended from vertebrates with four limbs). Living tetrapods include mammals, birds, reptiles, and amphibians.

Physeter macrocephalus

The scientific name for the sperm whale, a large marine mammal known for its deep diving capability and large brain.

Tiktaalik

An extinct genus of fish-like tetrapods that provides insight into the evolutionary transition from water to land animals.

Synapomorphy

A characteristic or feature that is shared by two or more taxa and is presumed to have been present in their most recent common ancestor, used in establishing evolutionary relationships.