Which of these supply the main energy source used in cellular respiration? A. lipids
B. amino acids
C. nucleic acids
D. carbohydrates

Were does condensation occur? a) hydroshereb) lithosherec) boishered) atmosphere

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?

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.