Moving onto land

Question 1

Support

Answer 1

skeletons: arthropods- chitin exoskeleton; vertebrates- internal cartilage and bone skeleton; other- external shell/ hydrostatic skeleton

Question 2

preventing dessication

Answer 2

secrete waxy coating, behavioral changes (stay in damp places), thicker skin

Question 3

Waste management

Answer 3

remove waste and prevent water loss- tubes and glands, concentrated waste, kidneys etc.

Question 4

gas exchange

Answer 4

gills to lungs- trachea opening and other complex tubes

Question 5

thermoregulation

Answer 5

greater temperature extremes on land- structural modifications to maintain homeostasis, also basking (exposure to sunlight) to thermoregulate

Question 6

reproduction

Answer 6

must be kept wet- some still tied to water; internal fertilization- development of amniotic egg

Question 7

Late devonian

Answer 7

rich oxygen, diverse life in oceans, life on land (plants a lot)