1. what do living things include? 2. can we say that we have already studied all the plants and animals that live in planet? what groupsofanimals do know? 3. in what way are plants and animals different? 4the text says that some plants are very tiny and some are very big.is that true about animals? can you give examples? 5. why can't we live without plants and animals? in what ways do we use them?