The noun of strengthen is strength.
the pupil
Gill
pseudopod
Homologous structures are similar evolutionary structures that evolved in different organisms that were used for the same purpose long ago but are no longer in use
used to strengthen the tower
Fluoride.
no it doesn't
It is used to strengthen bones in the human body.
It helps to strengthen and keep our bones healthy and strong.
Humans can reduce tornado damage be building structures to withstand extreme winds.Such measures may include:Hurricane ties to strengthen the roof-wall connection.Steel anchor bolts and sill plates to connect structures to their foundations.Close spacing of support beans to strengthen walls.Wind resistant glass wind windows.Discourage building houses with gabled roofs.Local policies banning or discouraging mobile home parks.
They don't, vestigial structures are biological structures with no known function that evolved from structures in distant ancestors that used to have a function that is no longer needed.
The Necessary and Proper Clause of the Constitution has been used to strengthen the power of the national government. It is also known as the Elastic Clause.
741 opamp
reinforcement
The exercise ball will strengthen different muscles depending on how you use it. It's probably most popular and frequently used for an abdominal work out.
That is the correct spelling of the word strengthen (to make stronger).