Chapter 4 Part 2 Flashcards
Gastrulation in mammals: Embryo develops from…
inner cell mass
Organogenesis in Chordates starts at…
end of gastrulation and cont. until birth
Organogenesis gives rise to 2 structures-
Notochord (mesoderm) and Dorsal nerve chord (ectoderm)
Neural plate forms, pinched off, forming…
neural crest
Neural crest cells migrate to…
different regions of developing embryo
Somites give rise to-
dermis, cartilage, tendons, vertebrae, direct path of neural crest cells
Neural Crest cells contribute to…
varied ecological roles in neural crest derivatives, help filter feeding to active predation
Neural Crest Cells bettered…
prey detection/rapid response to sensory information
Von Baer’s law of embryology-
characteristics of animal group appear earlier in embryo
Development proceeds from general to…
specific
Evolutionary innovations arise from existing features than…
new construction
Laws describes…
patterns in nature under specific conditions. Describes What
Theory-
can make predictions, can change. Describes Why
