Which are responsible for the humoral immune response?

A. neutrophils
B. macrophages
C. T cells
D. B cells
E. helper cells


Answer: D. B cells

Biology & Microbiology

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Anthers produce

a. ovules. b. seeds. c. megaspores. d. nectar. e. none of these.

Biology & Microbiology

Chronically high blood pressure is called

a. ventricular fibrillation. b. hypertension. c. leukemia. d. sickle-cell anemia. e. a stroke.

Biology & Microbiology

Which of the following sequences correctly lists the hierarchical nature of cellular structures, from smallest to largest?

A) organic molecules, supramolecular structures, macromolecules, organelles, cells B) organelles, organic molecules, supramolecular structures, macromolecules, cells C) organic molecules, macromolecules, organelles, supramolecular structures, cells D) organic molecules, macromolecules, supramolecular structures, organelles, cells E) macromolecules, organic molecules, supramolecular structures, organelles, cells

Biology & Microbiology

Parthenogenesis is a method of reproduction in which

a) an egg develops without being fertilized by a sperm b) the parent animal divides into two new animals c) an egg develops after being fertilized by a sperm d) the offspring develops as an outgrowth of the parent's body wall

Biology & Microbiology