Individuals with severe combined immunodeficiency syndrome (SCID) have a genetic defect that prevents proper formation and expression of immunoglobins and T cells and therefore do not have adaptive immunity

Indicate whether the statement is true or false.


Answer: TRUE

Biology & Microbiology

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Which of the following is most likely to occur when a tumor-suppressor gene is mutated?

A. The tumor-suppressor gene may be overactive. B. The resulting tumor-suppressor protein would further suppress cell proliferation. C. The resulting tumor-suppressor protein would activate an oncogene. D. The tumor-suppressor gene and resulting protein may lose its function and ability to suppress cell proliferation. E. None of the choices are possible.

Biology & Microbiology

The most severe mass extinction occurred at the end of the Permian Period

a. True b. False

Biology & Microbiology

Give an explanation of three reasons why angiosperms are so diverse and widespread

What will be an ideal response?

Biology & Microbiology

Which of the following is the closest living

relative to a bird?

a. lizards b. alligators c. bats d. dinosaurs e. winged insects

Biology & Microbiology