Place the three primary cell layers of an embryo in order from superficial to deep
a. ectoderm ? endoderm ? mesoderm
b. ectoderm ? mesoderm ? endoderm
c. endoderm ? ectoderm ? mesoderm
d. endoderm ? mesoderm ? ectoderm
e. mesoderm ? ectoderm ? endoderm
B
Biology & Microbiology
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In mollusks, which of the following encloses the gills and anus?
a. mantle b. nacre c. cuticle d. clitellum
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Bone tissue is a storage area for ____
a. phosphate b. sodium c. potassium d. calcium e. chloride
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Allergies are hypersensitivities to substances that ordinarily would do no harm to the body.
Answer the following statement true (T) or false (F)
Biology & Microbiology
What is the extracellular, metabolically inert, and infective form of Chlamydia?
A. Reticulate body B. Elementary body C. Replicate body D. Initial body
Biology & Microbiology