A shark's fin and a tiger's claws

A spider's legs and a horse's legs

A monkey's tail and an elephant's tail

A man's arms and a bird's wings

perform the same general function

are only found in highly developed animals

are genetically related

come from different embryological structures

Buildings

units of grammar

Organizational principles

Features of an animal's anatomy

difficult to understand

easier to understand through examples than through definitions

impossible to explain

simple to define but hard to apply

inflexible

ideal

unnatural

steep

Feeling

perception

meaning

logic

'of the same kind'

'of the same place'

'of the same race'

'of the same destiny'

to

at

for

upon

desist

divulge

disperse

domineer

had

be

have had

have

nerve specialist

skin specialist

bone specialist

psychiatrist

The door is to be shut

let the door be shut

The door may be shut

The door will be shut

to capitulate

to rebuff

to repel

to thwart

many more information must be reviewed

is necessary to review more

another information must to be reviewed

we must review much more information

participle

gerund

verb

adjective

concise

comprehensive

concrete

coherent

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A general concept is introduced , examples are given , and a conclusion is offered.

Two proposals are suggested and support for both is offered.

Two definitions of the same concept are compared.

A contrast is drawn between two concepts be means of examples.