Concept explainers
To explain: The major challenges faced by insects when they are colonized in land.
Concept introduction: Kingdom Animalia includes all animals. Animals are multicellular and heterotrophic organisms. They obtain nutrients by decomposing organic materials or by ingesting other organisms. All organisms are motile. Sexual reproduction takes in almost all animals.
To explain: The evolutionary innovations are used by insects to face the environmental challenges that affect them when they are colonized in land.
Concept introduction: Kingdom Animalia includes all animals. Animals are multicellular and heterotrophic organisms. They obtain nutrients by decomposing organic materials or by ingesting other organisms. All organisms are motile. Sexual reproduction takes in almost all animals.
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