______ is the act of grouping things by using a set of rules.

• genus
• kingdom
• species
• classification

All living things belong to one of five groups called a ________.

• kingdom
• monerans
• fungi
• species

Living things that have many cells and get food from other living things are ______.

• genus
• fungi
• protist
• classification

Living things that have one cell witha nucleus are _______.

• genus
• protists
• kingdom

Those with no nucleus are ________.

• species
• genus
• monerans

Kingdom is the largest group in which to classify living things and _______ is the smallest.

• genus
• species

_______ is the second smallest group to classify living things.

• species
• genus

In the animal kingdom, there are 2 main groups. The group of animals that have a backbone are called _______

• vertebrates
• invertebrates

Animals that have hair and milk their young are called ________. 

• monerans
• mollusks
• mammals

_______ are animals that have dry, scaly skin.

• reptiles
• mammals
• arthropods