Study Goals Exam 2 Week 6

Question 1

Germ Layers

Answer 1

Embryonic tissues organized in layers

Question 2

Why are Germ Layers Important to Animal Development and Anatomy?

Answer 2

-Ectoderm gives rise to skin & nervous system
-Endoderm gives rise to lining of digestive tract and organs connected such as the liver
-Mesoderm gives rise to circulatory system, muscle, & internal structures such as bone & most organs

Question 3

Are you a member of Bilateria? How would you know?

Answer 3

Yes humans are apart of Bilateria because the body is very symmetrical bilaterally

Question 4

The most primitive taxa of most Bilaterian clades have a worm-like body — what do you think this tells us about body shape and mode of locomotion in the common ancestor of Bilateria?

Answer 4

Enabled them to move quickly, efficiently, and to be very flexible in different environments

Question 5

Mollusks & Arthropods synapomorphies that have contributed to their success? Why?

Answer 5

-Mollusks: foot, visceral mass(main organ system), mantle(covers the visceral mass)
-Arthropods: segmented body, exoskeleton(hard external skeleton), jointed appendages(between legs & other appendages)

Question 6

What environmental and life factors do you think select for social intelligence as an adaptation?

Answer 6

-Survival conditions
-Environmental conditions
-Food sources