Old cultures of bacteria that have lost their ability to cause disease are said to be
select one:
a. impotent.
b. virulent.
c. pathogenic.

If a grape were placed in a hypertonic solution what would happen and why?

Aragonite shells of clams, snails, or scleractinian corals may be preserved unaltered in cenozoic deposits, but they are generally dissolved or recrystallized in older deposits. true or false

Which is an innovation of gymnosperms? gymnosperms are the first seed plants. gymnosperms are the first flowering plants. gymnosperms are the first vascular plants. gymnosperms are the first spore plants.