there are specific critical periods during fetal development in which any damage caused to the fetus from malnutrition or exposure to toxins is irreversible. when do these periods occur?

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

Mitosis creates two identical daughter cells from one parent cell creates four nonidentical daughter cells from one parent cell is the most common type of reproduction for bacteria is the process by which male and female reproductive cells are created

The table above shows five different types of chromosomal abnormalities that can occur during meiosis. they result in either an individual having too many or too few chromosomes in their genome. what is the most likely cause of these chromosomal abnormalities?