How does the muscular system work with the digestive system? By diffusing oxygen across the alveolar secs in the lungs
B
By increasing the pH in the stomach
8.
By contracting the muscles near the intestines to help with food passage
By creating antibodies to help fight disease

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.

According to cell theory; which structures carry out the basic function of living things? a. atoms b. organs c. cells b. nuclei

Which of the following correctly matches an immune system cell with the defense it produces? a. b cells release cytotoxins. b. t cells release cytotoxins. c. b cells absorb antibodies. d. t cells absorb antibodies.