Form 1:
Nutrition in Plants and Animals

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Types of Dentition

Homodont dentition: Teeth arrangement and description where an organism has teeth of the same size and shape. Fishes and birds have homodont dentition.

Heterodont dentition: where an organism has teeth of different sizes and shapes that is incisors, canines, premolars and molars. Heterodont dentition is common with mammals and reptiles.

a) Incisors

Are flat and chisel shaped with sharp ridged edges for cutting and biting food.

They have one root.

b. Canines

Are conical teeth with sharp pointed edges modified for seizing and tearing prey among carnivores.

They have one root

c. Premolar and molar

They have cusps on their surface to suit their grinding action.

Premolars have two roots.

Molars have either two or three roots.

Classes of Holozoic Heterotrophs.

Holozoic heterotrophs are classified according to the type of food they consume.

These are:

a) Herbivores: heterotrophs that exclusively feed on vegetation.

b) Carnivores: heterotrophs that exclusively feed on flesh.

c) Omnivores: heterotrophs that feed on both flesh and vegetation.

Dentition of heterotrophs is based on the kind of food they consume.