Preserving food is a common practice both at home an industry. When preserving food in jars or cans, one should be most concerned about bacterial spores left over and less about
the vegetative bacteria themselves. Briefly tell me what spores are and why my statement is
true.

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?

Where is having brightly colored feathers that attract mates most clearly an adaptation for a bird? a. a forest with dense vegetation b. a sandy beach beside an ocean c. a snowy tundra with little vegetation d. a swamp with many hawks that eat birds