What type of cell produces antibodies?
A. plasma cells
B. cytotoxic T cells
C. macrophages
D. helper T cells
Answer: A. plasma cells
You might also like to view...
Which type of speciation occurs when there is a shift in the chromosomal number?
a. Allopatric b. Gene flow c. Stabilizing selection d. Sexual selection e. Sympatric
A sailor listening to a shortwave radio heard that the Greenwich mean time (the time at Greenwich, England) was 12:00 p.m. The sailor looked at her watch, which was set according to the time at a nearby location, and found it to be 3:00 p.m. What is the longitude of the sailor?
What will be an ideal response?
Pollen grains are produced directly by
a. carpels. b. mitosis. c. meiosis. d. stigmas. e. pollen sacs
Blood types (A, B, and O) are controlled by
a. sex-linked genes. b. linked genes. c. multiple genes. d. multiple alleles. e. single alleles.