Transistors Were Invented in 1948 as a Substitute for the Vacuum

question 121

Multiple Choice

Transistors were invented in 1948 as a substitute for the vacuum tube. They appeared in computers

• A)8 years later.
• B)only in Canada.
• C)once computers were networked.
• D)the next year.

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Definitions:

Cephalothorax

A body region found in certain arthropods, including spiders and crustaceans, that combines the head and the thorax into one unit.

Fangs

Long, pointed teeth typically found in venomous snakes used to inject venom, or in some mammals for grasping and tearing.

Deuterostome

Group of coelomate animals in which the second embryonic opening is associated with the mouth; the first embryonic opening, the blastopore, is associated with the anus.

Notochord

A flexible rod made out of a material similar to cartilage that provides support in all embryonic and some adult chordate animals.