Which of the following statements are accurate? (MORE THAN ONE OPTION)
A. Bilaterians include three clades:
1. Deuterstomia
2. Protostomia
3. Ecdysozoa
B. Invertebrates are animals that lack a backbone
C. Lophotrochozoans, which includes molluscs and insects, typically have an exoskeleton that they can shed.
D. All animals except sponges share a common ancestor
E. Givens about animal "A"
I. the animal has three prominent germ layers
II. an animal has bilateral symmetry
III. the animal lacks a backbone
You would be only be able to classify this animal, animal A, as a lophotrochozoa

The statements in options A,B,C,D and E are correct:

A. Deuterstomia, Protostomia and Ecdysozoa are clades of bilaterians.

B. Invertebrates do not posses a back bone.

C. Lophotrochozoans posses a flexible exoskeleton for protection from harmful environments.

D. Studies show that sponges do not consist in a group with a common ancestry hence all animals except sponges share a common ancestor.

E. Lophotrochozoans posses three germ layer: the endoderm mesoderm and ectoderm, are bilaterally symmetrical and are invertebrates.

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.