1- If the figure is a dorso-ventral cut of an 8 day mouse embryo, the paraxial mesoderm is labeled
a
b
c
d

2- Somitomeres are
segments of paraxial mesoderm that form in the cranial region
paired blocks of mesoderm that form on either side of the notochord
segments of paraxial mesoderm that give rise to vertebrae
segments of medial and lateral mesoderm that condense to form somites

3- The first pair of somites is established at the expense of ___ somitomeres
2
4
6
8

4- Somites differentiate into
sclerotome, dermatome and mesenchyme
sclerotome, myotome and dermatome
myotome and dermatome
myotome and mesenchyme

5- Myotome eventually forms
muscle and dermis
muscle
dermis and cartilage
bone and cartilage

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Answers:

1- If the figure is a dorso-ventral cut of an 8 day mouse embryo, the paraxial mesoderm is labeled
Answer: a

2- Somitomeres are
Answer: segments of paraxial mesoderm that form in the cranial region

3- The first pair of somites is established at the expense of ___ somitomeres
Answer: 8

4- Somites differentiate into
Answer: sclerotome, myotome and dermatome

5- Myotome eventually forms
Answer: muscle