What effect does extreme temperature and extreme pH have on enzyme activity?

It speeds up enzyme activity.
It stops enzyme activity.
It slows down enzyme activity.
It has no effect on enzyme activity.

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

Asolution containing hci would likely have

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.