What change in the frog's environment could have affected their population? a) lots of flies located in and around the bog b) a new species of frog being introduced to the bog c) decreased amounts of precipitation leading to a drought d) an old tree falling over and beginning to decompose in the bog

How can an organ, such as the lungs, work for multiple body systems?

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.

What is the function of the nucleus in the euglena cells you observed?