The process by which an antigen binds to a specific antibody on a naïve B cell, thereby triggering mitosis and the build-up of a large population of antibody-secreting plasma cells (also known as effector B cells), is called ____________________
Fill in the blank(s) with correct word
clonal selection
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Experiments with ribbon worms and planaria have shown that
A. it is easy to hybridize the two species in nature. B. Pax6-related genes are not always required for eye regeneration. C. the DNA of each is sufficiently similar that they can be hybridized in a lab setting. D. their eyes are examples of convergent evolution.
DNA is
a. composed of protein and lipid subunits. b. organized into functional units called genes. c. organized into functional units called chromosomes. d. organized into functional units called ribosomes. e. organized from information contained in proteins.
A person with blood group A has both A and B type antibodies. Indicate whether the statement is true or false
Which of the following is NOT a characteristic of protozoa?
A) Most exhibit asexual reproduction. B) They are single-celled organisms. C) They are eukaryotic organisms. D) They are all photosynthetic. E) They frequently possess cilia or flagella.