The pH of the vagina is basic because that is the pH sperm prefer.
Answer the following statement true (T) or false (F)
False
The pH of the vagina is acidic. However, sperm do prefer a basic pH provided by seminal fluid.
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The group comprising the largest number of species on Earth is the _________.
Fill in the blank(s) with the appropriate word(s).
A restriction in genetic variability caused by a drastic reduction in population size is called a
A. adaptive effect. B. bottleneck effect. C. Hardy-Weinberg effect. D. founder effect. E. polymorphic effect.
Which group comprises a significant portion of phytoplankton and therefore is important to marine food webs?
A) Protozoa B) Slime molds C) Cyanobacteria D) Diatoms E) Euglenids
Ionizing radiation causes
A. insertions and deletions. B. thymine dimers. C. nitrogenous base substitutions. D. DNA strand breaks.