An ionic interaction, such as the interaction between Na+ and Cl-, is considered a covalent bond
A. true
B. false
Answer: B
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Experiments on selective adhesion between ectoderm, mesoderm, and endoderm derived from amphibian embryos
demonstrated that ____.
a. ectoderm cells have positive affinity for mesoderm cells but negative affinity for endoderm cells b. ectoderm cells have negative affinity for mesoderm cells but positive affinity for endoderm cells c. mesoderm cells have negative affinity for endoderm and ectoderm cells d. ectoderm cells have positive affinity for both endoderm and mesoderm cells e. endoderm cells have positive affinity for both ectoderm and mesoderm cells
Water is oxidized by ________
a. photosystem II b. ATP c. NADP+ d. photosystem I
Which cell does NOT belong with the others?
a. erythrocytes b. neutrophils c. lymphocytes d. eosinophils e. macrophages
Four of the five answers listed below are actions mediated by the sympathetic nervous system. Select
the exception. a. pulse increases b. blood glucose levels drop c. metabolism increases d. digestion slows down e. pupils of the eye dilate