The heart, muscles, bones, and blood develop primarily from:
a. ectoderm
b. mesoderm
c. endoderm
d. the placenta
e. the yolk sac
b
Biology & Microbiology
You might also like to view...
Phospholipase C hydrolyzes a membrane phospholipid to produce ____
A. IP3 only. B. protein kinase C only. C. diacylglycerol only. D. both IP3 and protein kinase C. E. both IP3 and diacylglycerol.
Biology & Microbiology
What kind of phylogenetic tree has a single lineage at the base?
What will be an ideal response?
Biology & Microbiology
The worldwide die-off of frogs has been traced to infection by
A) zygomycetes. B) ascomycetes. C) basidiomycetes. D) glomeromycetes. E) chytrids.
Biology & Microbiology
Voluntary muscle control is one of functions of the
A) cerebellum. B) cerebrum. C) spinal cord. D) brain stem. E) meninges.
Biology & Microbiology