Q: Does "defense" have the same meaning in the following two sentences?

Defense against hurricanes is an urgent problem.

A good boxer needs a good defense.

A: the same meaning

Q: Does "drop" have the same meaning in the following two sentences?

Drop him from the Republican ticket.

The cow dropped her calf this morning.

A: different meanings

Q: Does "variety" have the same meaning in the following two sentences?

The range and variety of his work is amazing.

Varieties are frequently recognized in botany.

A:
different meanings