Which of the following white blood cells kills infected or cancerous body cells?
a. eosinophils
b. B lymphocytes
c. natural killer (NK) cells
d. mast cells
c
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A virus that kills its host is said to be
A) lytic or virulent. B) temperate. C) lysogenic. D) virulent or lysogenic, but not temperate.
Hershey and Chase used 35S-labeled protein and 32P-labeled DNA of T2 bacteriophage to infect cells of Streptococcus pneumoniae bacteria.
Answer the following statement true (T) or false (F)
Which of these organisms is semalparous?
A. humans B. oak trees C. bears D. dogs E. agave plants
Tendrils are
A. structures in some carnivorous plant leaves that trigger the leaves to close on insects. B. starch-storing specialized roots. C. specialized stems that grow across the ground, and reproduce shoots and roots. D. the central, supporting stalk of a compound leaf. E. specialized stems that coil and provide springy attachment for climbing.