Precocial and Altricial Development (Grade 12 NSC Matric Life Sciences): Flashcards
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Precocial development definition
Precocial development definition
Young born/hatched in well-developed state
Altricial development definition
Altricial development definition
Young born/hatched in under-developed state
Eye condition in precocial young
Eye condition in precocial young
Eyes open, can see immediately
Eye condition in altricial young
Eye condition in altricial young
Born blind with closed eyes
Body covering in precocial young
Body covering in precocial young
Have fur or feathers for insulation and protection
Body covering in altricial young
Body covering in altricial young
Born naked, no fur or feathers
Parental care needs of precocial young
Parental care needs of precocial young
Need little care, can often feed themselves
Parental care needs of altricial young
Parental care needs of altricial young
Require extensive care for survival, feeding, warmth, protection
Effect of large yolk quantity in eggs
Effect of large yolk quantity in eggs
More nutrients for development, results in precocial young
Examples of precocial species
Examples of precocial species
Ducklings, chickens, horses