Biology 104 Exam 1 with correct
Answers
What is the term for an animal whose blastopore develops into the mouth? - Answer -
Protostome
What is the term for animals who lack an internal body cavity? - Answer -acoelomate
What is the serial repetition of body parts in a bilaterally symmetrical animal? - Answer -
Segmentation(metamerism)
Which type of skeleton does an earthworm have? - Answer -Hydrostatic skeleton
What type(s) of muscles do earthworms use for movement? - Answer -Circular and
Longitudinal
What type of cleavage do protostomes have? - Answer -spiral
What is the term for coelom formation by out-pocketing of the primitive gut? - Answer -
entercoelom
What is the term for coelom formation by splitting of the mesoderm? - Answer -
schizocoelom
Which germ layer is missing in an animal that is diploblastic? - Answer -mesoderm
What is the protein found in the outer layer of the epidermis that makes the skin tough?
- Answer -Keratin
What is the lipid secreted onto the skin to prevent desiccation and to help condition the
skin? - Answer -sebum
What is the primary cell type that typifies bone connective tissue? - Answer -osteoblasts
What is the glandular secretion where the entire cell becomes a part of the secretion? -
Answer -holocrine secretion
What type of muscle tissue has fibers connected at intercalated discs? - Answer -
Cardiac Muscles
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