Crossing over occurs when a.) sister chromatids are pulled apart at the centromere during anaphase ii. b.) homologous chromosomes join together to form tetrads during prophase i. c.) chromosomes are grouped together into new nuclei during telophase ii.                  d.) tetrads of homologous chromosomes randomly line up in metaphase i.

Glucose is a form of sugar found in the blood cells use glucose as a source of energy, but too much or too little can cause serious health issues so, the body uses the hormone insulin to regulate glucose n the blood insulin maintain glucose levels in the blood if blood glucose lovels got very high, what would you expect to see happen to insulin levels?

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

Which diagram best represents the chromosomes that would be found in a two new skin cells produced as a result of this process?