A function of antibodies is to _____
A) inject toxins into living pathogens
B) secrete cytokines that attract macrophages to infection sites
C) release perforins to disrupt infected cells
D) act as Toll-like receptors
E) mark pathogenic cells for destruction
Answer: E
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In the Drosophila embryo, gap genes govern the partitioning of the anterior-posterior gradient into segments
A. true B. false
The ____ cycle is a sedimentary cycle
a. carbon b. water c. nitrogen d. phosphorus e. atmospheric
Essentially all exchange of gases and other materials between the circulatory system and tissues of the body or the outside world (e.g., in the lungs) occurs in the
A. veins. B. capillaries. C. arteries. D. heart. E. lymphatic system.
Oxytocin is secreted from the _______
Fill in the blank(s) with correct word