Birth, Growth, and Reproduction Flashcards
What is the major evolution of Amniotes?
The amniotic egg
What is the advantage of amniotic eggs?
They can be laid in dry environments and prevent desiccation
What type of filter is the shell of the amniotic egg?
Selectively permeable lets air in and out keeps water in
What limits the size eggs can become?
The cube-square law, eggs need a certain surface area in order to move enough air
How can bones help Paleontologists measure growth rate?
Using histology and lines of arrested growth, during periods of low resources bones grow slower than than in times of plenty
What is characteristic of young bones?
They have high vascularity and lamellar texture
What is mature bone called?
Haversian
What are the final LAGs called as growth stops?
The external fundamental system
What is ontogenetic change?
Change in individuals as they age
What are changes in proportional features over time?
Non-Isometric ontogenetic change
What are changes in size without proportional change?
Isometric ontogenetic change
What is Sexual Dimorphism?
When males and females of the same species are visually different
What feature can we use to differentiate between male and female dinosaurs?
Medullary Bone with lots of calcium
Did dinosaurs exhibit lots of parental care towards their young?
There is evidence to suggest that they did and that they didn’t depend on the species
