25.5 growth and development

Question 1

heterochrony

Answer 1

evolutionary change in he rate /timing of developmental events

Question 2

pædomorphosis

Answer 2

if reproductive organs accelerates compared to the other organs, the mature stage of a species could retain some body features that were juvenile structures in ancestral species

Question 3

pædomorphosis in salamanders

Answer 3

most go from aquatic larvae to adult

-some species - axoltyl-grow to adult size and maturity while still having some larval organs ( like gills)

Question 4

homeotic genes

Answer 4

determine where things like wings and legs are located and how flower petals are arranged

Question 5

hox genes

Answer 5

provide positional information in an animal embryo

Question 6

sometimes, change in ______ can change the expression of the gene rather than change in ______

Answer 6

regulation of the gene

sequence

Question 7

structures that evolve in one context that become other functions are called

Answer 7

exaptations

like jaw bones that become ear bones

Question 8

species selection

Answer 8

inter species natural election where the species that endure the longest and produce more offspring determine major evolutionary trends