What category of cells includes both phagocytes and lymphocytes?
A. Leukocytes
B. Platelets
C. Erythrocytes
D. Target cells
Answer: A
Biology & Microbiology
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The surface of a plant root is called the ________.
What will be an ideal response?
Biology & Microbiology
What is the major reservoir of phosphorus?
a. atmosphere b. sedimentary rock c. ocean d. land food webs e. groundwater
Biology & Microbiology
If the copy number of a proto-oncogene is increased by gene duplication then the proto-oncogene has undergone
A. a missense mutation. B. a nonsense mutation. C. a chromosomal translocation. D. gene amplification. E. retroviral insertion.
Biology & Microbiology
Please match the type of T cells with the statements that most accurately describe them to test your understanding of the relationships between the types of T cells and their receptors.
CD4 A) All T cells B) Helper T cells C) Cytotoxic T cells
Biology & Microbiology