The maximum antibody concentration produced by
primary immune response is indicated by
a. A.
b. B.
c. C.
d. D.
e. E.
Answer: e
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On which bone would you find extensive sites for muscle attachments?
a. scapula b. sternum c. patella d. rib e. metatarsals
Predict what would happen if crossing over between homologous chromosomes occurred as part of mitosis.
A) Daughter cells would not be genetically identical. B) Daughter cells could contain two copies of the same allele. C) There would be no effect because sister chromatids separate in anaphase. D) Daughter cells would not be genetically identical, and they could contain two copies of the same allele.
Archaea often live in nutrient-poor environments. In order to ensure survival, they must ________.
A. accumulate nutrients inside the cell at higher concentrations than the external environment, which requires active transport mechanisms B. develop metabolic pathways to synthesize their own nutrients using cytoplasmic molecules C. acquire nutrients inside the cell at lower concentrations than the external environment, which requires passive transport mechanisms D. transport nutrients to the outside of the cell by facilitated diffusion
Which hormones counteract each other in regulating calcium homeostasis?
A. atrial natriuretic peptide and aldosterone B. antidiuretic hormone and parathyroid hormone C. antidiuretic hormone and aldosterone D. antidiuretic hormone and vitamin D (1,25 dihydroxyvitamin D) E. parathyroid hormone and vitamin D (1,25 dihydroxyvitamin D)