One of the two strains of Streptococcus pneumoniae isolated in the 1920s was surrounded by a
____________________, giving it the ability to evade the immune system and cause pneumonia. Fill in the blank(s) with the appropriate word(s).
capsule
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Although heavy metals are no longer widely used as germicides, ________ is an effective algicide in lakes and swimming pools.
A. mercuric chloride B. silver nitrate C. lead acetate D. copper sulfate
Which term refers to the state in which the body temperature increases a few degrees above normal for a prolonged period?
a. thermal acclimatization b. estivation c. hypothermia d. hyperthermia
A cell that uses an organic carbon source and obtains energy from light would be called a
A) photoheterotroph. B) lithoautotroph. C) photoautotroph. D) chemoheterotroph. E) chemoautotroph.
Why is variegation in four o'clock plants determined by the phenotype of the ovule source?
A) The mitochondria determine the leaf coloration, and the mitochondria are inherited through the ovule. B) Dominant genes demonstrating variegation come from the ovule. C) Recessive genes demonstrating variegation come from the ovule. D) The ovule nuclear genome contains the genes for leaf coloration. E) The chloroplasts determine the leaf coloration, and the chloroplasts are inherited through the ovule.