Vocabulary

The vast .......of animals deteriorate with age just like people do.

• many

• majority

Ants are .........creatures.

• social

• sociable

The older ants are as ..........as the young ones.

• aggressive

• aggressively

we can measure .......active a person is by looking at his outdoor activities.

• what

• how

Age doesn't seem to ......ants' brain functions.

• affect

• effect

This is the first time that scientists ..............ants' behaviors.

• studied

• have studied

• insects

• sea creatures

• wildlife

• predators

• insects

• vet

• entomologist

• steep increase

• steep decrease